81661590 (number)

81661590 is an even 8-digits composite number following 81661589 and preceding 81661591. In scientific notation, it is written as 8.1661590 × 10^7. The sum of its digits is 36. It has a total of 6 prime factors and 64 positive divisors. There are 20915712 positive integers (up to 81661590) that are relatively prime to 81661590.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 8.1661590 × 10^7
Engineering notation 8.1661590 × 10^6

Prime Factorization of 81661590

Prime Factorization 2 × 37 × 15 × 3 × 179 × 137

Composite number
ω Distinct Factors 6
Total number of distinct prime factors
Ω Total Factors 6
Total number of prime factors
rad Radical 81661590
Product of the distinct prime numbers

The prime factorization of 81661590 is 2 × 37 × 15 × 3 × 179 × 137. Since it has a total of 6 prime factors.

Most popular turbo-numbers

5, 3, 45, 73, 556, 668, 8647, 7609, 93845, 16005, 2199, 157051, 3115656, 6297002, 44085901, 60442134, 644658965, 416552724, 880340566, 6988829700

Basic calculations (n = 81661590)

Multiplication

n×y
n×2 163323180
n×3 244984770
n×4 326646360
n×5 408307950

Division

n÷y
n÷2 40830795
n÷3 27220530
n÷3 20415397.5
n÷5 16332318

Exponentiation

ny
n2 6668615281328100
n3 5.4456972697155E+23
n4 4.4470429770363E+31
n5 3.6315260030311E+39

Nth Root

y√n
2√n 9036.6802532789
3√n 433.84967575869
4√n 95.061455139709
5√n 38.229935590928

Divisors of 81661590

1, 2, 3, 6, 15, 30, 37, 45, 74, 90, 111, 137, 179, 222, 274, 358, 411, 537, 555, 822, 1074, 1110, 1665, 2055, 2685, 3330, 4110, 5069, 5370, 6165, 6623, 8055, 10138, 12330, 13246, 15207, 16110, 19869, 24523, 30414, 39738, 49046, 73569, 76035, 99345, 147138, 152070, 198690, 228105, 298035, 367845, 456210, 596070, 735690, 907351, 1103535, 1814702, 2207070, 2722053, 5444106, 13610265, 27220530, 40830795, 81661590

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 -81661589
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 81661590 can be divided by 64 positive divisors. The sum of these divisors (counting 81661590) is 1, the average is 0.015625.

Base conversion 81661590

Base System Value
2 Binary 100110111100000111010010110
3 Ternary 12200122211122100
4 Quaternary 10313200322112
5 Quinary 131401132330
6 Senary 12034142530
8 Octal 467407226
10 Decimal 81661590
12 Duodecimal 23421a46
16 Hexadecimal 4de0e96
20 Vigesimal 15a7dja
36 Base36 1cmahi

Cryptographic Hash Functions

md5 7d57854ff6da365b3dc9138dd8b9b540
sha1 30beda8b98356d78fdc86fabbd6795e047ad2db7
sha256 57d73d95e7579338a26d1c94a53e683bafcbf31710bfe88b75ff1380eb88fbf2
sha512 3a2275155cb7c62a096afcc184d0cd1da8273dd77a74e01d70d0b231d4346cb3ee8dcb7c6340f00901a53e6c7c968c63971ffb423bf03d1ab2f33dc4c6871b82
ripemd-160 e7c32ab437fa6fedfe987657e62f6e29732f7784

81661590 as geometric shapes

Circle

Radius = n
Diameter 163323180
Circumference 513094902.44892
Area 2.0950072777437E+16

Sphere

Radius = n
Volume 2.2810883381616E+24
Surface area 8.3800291109748E+16
Circumference 513094902.44892

Square

Length = n
Perimeter 326646360
Area 6668615281328100
Diagonal 115486928.10295

Cube

Length = n
Surface area 40011691687968600
Volume 5.4456972697155E+23
Space diagonal 141442022.90686

Equilateral Triangle

Length = n
Perimeter 244984770
Area 2.8875951208476E+15
Altitude 70721011.453429

Triangular Pyramid

Length = n
Surface area 2.8875951208476E+15
Volume 6.4178157795082E+22
Height 38495642.700984