81581680 (number)

81581680 is an even 8-digits composite number following 81581679 and preceding 81581681. In scientific notation, it is written as 8.1581680 × 10^7. The sum of its digits is 37. It has a total of 6 prime factors and 20 positive divisors. There are 32632640 positive integers (up to 81581680) that are relatively prime to 81581680.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 8.1581680 × 10^7
Engineering notation 8.1581680 × 10^6

Prime Factorization of 81581680

Prime Factorization 2 × 2 × 2 × 2 × 5 × 1019771

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 6
Total number of prime factors
rad Radical 10197710
Product of the distinct prime numbers

The prime factorization of 81581680 is 2 × 2 × 2 × 2 × 5 × 1019771. Since it has a total of 6 prime factors.

Most popular turbo-numbers

5, 9, 25, 87, 970, 494, 3602, 3385, 70951, 50211, 826352, 802543, 6182415, 9406821, 85018082, 7787014, 563209453, 350305744, 6053947514, 7901617678

Basic calculations (n = 81581680)

Multiplication

n×y
n×2 163163360
n×3 244745040
n×4 326326720
n×5 407908400

Division

n÷y
n÷2 40790840
n÷3 27193893.333333
n÷3 20395420
n÷5 16316336

Exponentiation

ny
n2 6655570511622400
n3 5.4297262369661E+23
n4 4.4296618835178E+31
n5 3.6137925828934E+39

Nth Root

y√n
2√n 9032.2577465438
3√n 433.70811494993
4√n 95.038190989432
5√n 38.222450675128

Divisors of 81581680

1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1019771, 2039542, 4079084, 5098855, 8158168, 10197710, 16316336, 20395420, 40790840, 81581680

20 divisors

τ Total Divisors 20
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81581679
Sum of the proper positive divisors of n
A Arithmetic Mean 0.05
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 20
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81581680 can be divided by 20 positive divisors. The sum of these divisors (counting 81581680) is 1, the average is 0.05.

Base conversion 81581680

Base System Value
2 Binary 100110111001101011001110000
3 Ternary 12200111210000201
4 Quaternary 10313031121300
5 Quinary 131341103210
6 Senary 12032324544
8 Octal 467153160
10 Decimal 81581680
12 Duodecimal 233a3754
16 Hexadecimal 4dcd670
20 Vigesimal 159he40
36 Base36 1ckkts

Cryptographic Hash Functions

md5 c119b3f3417a2c89d422e0513244eee6
sha1 b1ce2af3b7b462a477b372850ca8e7ffa5d163ba
sha256 69e1a70144b5614470b21b5f8bd6fa43217739ec40b4fe8568dfb792fa9ce7b1
sha512 acc1d59b1ab1112d269ed35616b81dd95abfd7513b4f2afda7455e056b4b753b1379b48a72abdeca651587a8896886c3f4029bcb635358a6df8abf1be007e4c2
ripemd-160 5658e1336cb6d22a1887e05f43ff7de1fb552940

81581680 as geometric shapes

Circle

Radius = n
Diameter 163163360
Circumference 512592813.11103
Area 2.0909091424762E+16

Sphere

Radius = n
Volume 2.2743984076075E+24
Surface area 8.3636365699047E+16
Circumference 512592813.11103

Square

Length = n
Perimeter 326326720
Area 6655570511622400
Diagonal 115373918.29718

Cube

Length = n
Surface area 39933423069734400
Volume 5.4297262369661E+23
Space diagonal 141303614.72683

Equilateral Triangle

Length = n
Perimeter 244745040
Area 2.8819465698718E+15
Altitude 70651807.363413

Triangular Pyramid

Length = n
Surface area 2.8819465698718E+15
Volume 6.3989937369088E+22
Height 38457972.765727