81648891 (number)

81648891 is an odd 8-digits composite number following 81648890 and preceding 81648892. In scientific notation, it is written as 8.1648891 × 10^7. The sum of its digits is 45. It has a total of 5 prime factors and 20 positive divisors. There are 52554096 positive integers (up to 81648891) that are relatively prime to 81648891.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 8.1648891 × 10^7
Engineering notation 8.1648891 × 10^6

Prime Factorization of 81648891

Prime Factorization 9 × 3 × 3 × 29 × 34759

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 27216297
Product of the distinct prime numbers

The prime factorization of 81648891 is 9 × 3 × 3 × 29 × 34759. Since it has a total of 5 prime factors.

Most popular turbo-numbers

5, 9, 87, 6, 396, 47, 8613, 6233, 53099, 51743, 402801, 280901, 2737226, 7488950, 37193026, 2450281, 261471052, 33299623, 4518710806, 5372806514

Basic calculations (n = 81648891)

Multiplication

n×y
n×2 163297782
n×3 244946673
n×4 326595564
n×5 408244455

Division

n÷y
n÷2 40824445.5
n÷3 27216297
n÷3 20412222.75
n÷5 16329778.2

Exponentiation

ny
n2 6666541401529881
n3 5.443157122405E+23
n4 4.4442774258312E+31
n5 3.6287032311545E+39

Nth Root

y√n
2√n 9035.9775896136
3√n 433.82718561514
4√n 95.057759228869
5√n 38.228746507656

Divisors of 81648891

1, 3, 9, 27, 29, 81, 87, 261, 783, 2349, 34759, 104277, 312831, 938493, 1008011, 2815479, 3024033, 9072099, 27216297, 81648891

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 -81648890
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 81648891 can be divided by 20 positive divisors. The sum of these divisors (counting 81648891) is 1, the average is 0.05.

Base conversion 81648891

Base System Value
2 Binary 100110111011101110011111011
3 Ternary 12200122012020000
4 Quaternary 10313131303323
5 Quinary 131400231031
6 Senary 12034004043
8 Octal 467356373
10 Decimal 81648891
12 Duodecimal 23416623
16 Hexadecimal 4dddcfb
20 Vigesimal 15a624b
36 Base36 1cm0or

Cryptographic Hash Functions

md5 e54384e63e069d8d42860f00a8b65d05
sha1 ccaee559c975371f606fa1c77d82abed55f720a5
sha256 d6c4b8fef300618c077b13ce5492ef26a3fa36f64617554312921ce8c723b766
sha512 ee27d64e8caf9b12f606c13e620947d35cd299972540908f0c7163d0174bac792c3aa7d37d80917ae2bcbc6f335a4ea9bff7fa53a70df9825cba3a9bfb937ace
ripemd-160 6de22d4303b78066c261dd3b5e1f5c8572bba585

81648891 as geometric shapes

Circle

Radius = n
Diameter 163297782
Circumference 513015112.27871
Area 2.0943557491898E+16

Sphere

Radius = n
Volume 2.2800243237443E+24
Surface area 8.3774229967594E+16
Circumference 513015112.27871

Square

Length = n
Perimeter 326595564
Area 6666541401529881
Diagonal 115468969.00492

Cube

Length = n
Surface area 39999248409179286
Volume 5.443157122405E+23
Space diagonal 141420027.59365

Equilateral Triangle

Length = n
Perimeter 244946673
Area 2.8866971045528E+15
Altitude 70710013.796827

Triangular Pyramid

Length = n
Surface area 2.8866971045528E+15
Volume 6.4148221871941E+22
Height 38489656.334974