81361640 (number)

81361640 is an even 8-digits composite number following 81361639 and preceding 81361641. In scientific notation, it is written as 8.1361640 × 10^7. The sum of its digits is 29. It has a total of 5 prime factors and 16 positive divisors. There are 32544640 positive integers (up to 81361640) that are relatively prime to 81361640.

Interesting facts

Basic properties

Name

Name eighty-one million three hundred sixty-one thousand six hundred forty

Notation

Scientific notation 8.1361640 × 10^7
Engineering notation 8.1361640 × 10^6

Prime Factorization of 81361640

Prime Factorization 2 × 2 × 2 × 5 × 2034041

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 20340410
Product of the distinct prime numbers

The prime factorization of 81361640 is 2 × 2 × 2 × 5 × 2034041. Since it has a total of 5 prime factors.

Most popular turbo-numbers

7, 5, 85, 39, 683, 963, 8317, 5336, 63926, 57636, 310261, 103675, 344781, 2360626, 1938117, 63773717, 343616797, 679212719, 7139142052, 1249567724

Basic calculations (n = 81361640)

Multiplication

n×y
n×2 162723280
n×3 244084920
n×4 325446560
n×5 406808200

Division

n÷y
n÷2 40680820
n÷3 27120546.666667
n÷3 20340410
n÷5 16272328

Exponentiation

ny
n2 6619716463489600
n3 5.3859098780451E+23
n4 4.3820646056995E+31
n5 3.5653196290567E+39

Nth Root

y√n
2√n 9020.06873588
3√n 433.31783508016
4√n 94.974042432025
5√n 38.201809873032

Divisors of 81361640

1, 2, 4, 5, 8, 10, 20, 40, 2034041, 4068082, 8136164, 10170205, 16272328, 20340410, 40680820, 81361640

16 divisors

τ Total Divisors 16
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81361639
Sum of the proper positive divisors of n
A Arithmetic Mean 0.0625
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 16
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81361640 can be divided by 16 positive divisors. The sum of these divisors (counting 81361640) is 1, the average is 0.0625.

Base conversion 81361640

Base System Value
2 Binary 100110110010111101011101000
3 Ternary 12200002121012002
4 Quaternary 10312113223220
5 Quinary 131312033030
6 Senary 12023510132
8 Octal 466275350
10 Decimal 81361640
12 Duodecimal 232b8348
16 Hexadecimal 4d97ae8
20 Vigesimal 158a420
36 Base36 1cfv1k

Cryptographic Hash Functions

md5 38115933b0acae531c15a451441933d8
sha1 b8d37fc87a48d5b32a219e6ee0d3391aacc70530
sha256 6c002feb315e4200bd447cf07bba63201b616f9a3739f13aa53367115844fd6c
sha512 318f31edccb269e61fe9b041798a9a4c189226b2994a9dba396251a5453ffaa7afe7704202321b71b924d406a2bb84245339875801bfa99dd530ebfa50a5d410
ripemd-160 0b0a7093b82eff7804e7fc978732d36d11cd86ed

81361640 as geometric shapes

Circle

Radius = n
Diameter 162723280
Circumference 511210261.01603
Area 2.0796452610546E+16

Sphere

Radius = n
Volume 2.2560446541018E+24
Surface area 8.3185810442185E+16
Circumference 511210261.01603

Square

Length = n
Perimeter 325446560
Area 6619716463489600
Diagonal 115062734.74492

Cube

Length = n
Surface area 39718298780937600
Volume 5.3859098780451E+23
Space diagonal 140922494.26713

Equilateral Triangle

Length = n
Perimeter 244084920
Area 2.866421311616E+15
Altitude 70461247.133564

Triangular Pyramid

Length = n
Surface area 2.866421311616E+15
Volume 6.3473556627089E+22
Height 38354244.914972