81591640 (number)

81591640 is an even 8-digits composite number following 81591639 and preceding 81591641. In scientific notation, it is written as 8.1591640 × 10^7. The sum of its digits is 34. It has a total of 7 prime factors and 64 positive divisors. There are 28385280 positive integers (up to 81591640) that are relatively prime to 81591640.

Interesting facts

Basic properties

Name

Name eighty-one million five hundred ninety-one thousand six hundred forty

Notation

Scientific notation 8.1591640 × 10^7
Engineering notation 8.1591640 × 10^6

Prime Factorization of 81591640

Prime Factorization 2 × 2 × 2 × 65 × 89 × 43 × 41

Composite number
ω Distinct Factors 5
Total number of distinct prime factors
Ω Total Factors 7
Total number of prime factors
rad Radical 20397910
Product of the distinct prime numbers

The prime factorization of 81591640 is 2 × 2 × 2 × 65 × 89 × 43 × 41. Since it has a total of 7 prime factors.

Most popular turbo-numbers

6, 2, 54, 41, 630, 32, 6298, 599, 26757, 33765, 934964, 103339, 9461859, 393899, 88334323, 52226853, 314832814, 263922171, 8159525558, 652849268

Basic calculations (n = 81591640)

Multiplication

n×y
n×2 163183280
n×3 244774920
n×4 326366560
n×5 407958200

Division

n÷y
n÷2 40795820
n÷3 27197213.333333
n÷3 20397910
n÷5 16318328

Exponentiation

ny
n2 6657195717889600
n3 5.4317151642359E+23
n4 4.4318254826288E+31
n5 3.6159990932147E+39

Nth Root

y√n
2√n 9032.8090868788
3√n 433.72576416171
4√n 95.041091570324
5√n 38.223383916559

Divisors of 81591640

1, 2, 4, 8, 41, 43, 65, 82, 86, 89, 130, 164, 172, 178, 260, 328, 344, 356, 520, 712, 1763, 2665, 2795, 3526, 3649, 3827, 5330, 5590, 5785, 7052, 7298, 7654, 10660, 11180, 11570, 14104, 14596, 15308, 21320, 22360, 23140, 29192, 30616, 46280, 114595, 156907, 229190, 237185, 248755, 313814, 458380, 474370, 497510, 627628, 916760, 948740, 995020, 1255256, 1897480, 1990040, 10198955, 20397910, 40795820, 81591640

64 divisors

τ Total Divisors 64
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81591639
Sum of the proper positive divisors of n
A Arithmetic Mean 0.015625
Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G Geometric Mean 1
Returns the nth root of the product of n divisors
H Harmonic Mean 64
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81591640 can be divided by 64 positive divisors. The sum of these divisors (counting 81591640) is 1, the average is 0.015625.

Base conversion 81591640

Base System Value
2 Binary 100110111001111110101011000
3 Ternary 12200112021200121
4 Quaternary 10313033311120
5 Quinary 131341413030
6 Senary 12032443024
8 Octal 467176530
10 Decimal 81591640
12 Duodecimal 233a9474
16 Hexadecimal 4dcfd58
20 Vigesimal 159ij20
36 Base36 1cksig

Cryptographic Hash Functions

md5 1855d43ec8ebef47b9c7053ad591a326
sha1 4a0474ba3c73dca845fc6e9d05c073699032cc9e
sha256 f0f4c080243856fdb8cccd7022a48d38bfee713142b9930d65f016f486b7c28a
sha512 7622c378e6c48c7919e7940bb0199a541cc63e19ae91f63140d5f86dadc5a3fc92a14b578c532538c5497cc84391996dfb9be3058e47d2a06450efb7b0549c8a
ripemd-160 bfe08ff8924b0ff3acff3590e15503db669f2439

81591640 as geometric shapes

Circle

Radius = n
Diameter 163183280
Circumference 512655393.63669
Area 2.0914197160831E+16

Sphere

Radius = n
Volume 2.2752315275141E+24
Surface area 8.3656788643326E+16
Circumference 512655393.63669

Square

Length = n
Perimeter 326366560
Area 6657195717889600
Diagonal 115388003.86426

Cube

Length = n
Surface area 39943174307337600
Volume 5.4317151642359E+23
Space diagonal 141320865.95287

Equilateral Triangle

Length = n
Perimeter 244774920
Area 2.8826503048287E+15
Altitude 70660432.976435

Triangular Pyramid

Length = n
Surface area 2.8826503048287E+15
Volume 6.401337710175E+22
Height 38462667.954754