81641618 (number)

81641618 is an even 8-digits composite number following 81641617 and preceding 81641619. In scientific notation, it is written as 8.1641618 × 10^7. The sum of its digits is 35. It has a total of 2 prime factors and 4 positive divisors. There are 40820808 positive integers (up to 81641618) that are relatively prime to 81641618.

Interesting facts

Basic properties

Name

Name eighty-one million six hundred forty-one thousand six hundred eighteen

Notation

Scientific notation 8.1641618 × 10^7
Engineering notation 8.1641618 × 10^6

Prime Factorization of 81641618

Prime Factorization 2 × 40820809

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 81641618
Product of the distinct prime numbers

The prime factorization of 81641618 is 2 × 40820809. Since it has a total of 2 prime factors.

Most popular turbo-numbers

5, 10, 29, 42, 150, 43, 7523, 8007, 78270, 64496, 437154, 285551, 5496689, 4197189, 17618052, 89401182, 84437889, 639419016, 4090087241, 5527949366

Basic calculations (n = 81641618)

Multiplication

n×y
n×2 163283236
n×3 244924854
n×4 326566472
n×5 408208090

Division

n÷y
n÷2 40820809
n÷3 27213872.666667
n÷3 20410404.5
n÷5 16328323.6

Exponentiation

ny
n2 6665353789657924
n3 5.441702679301E+23
n4 4.4426941141307E+31
n5 3.6270873575671E+39

Nth Root

y√n
2√n 9035.5751338805
3√n 433.81430395901
4√n 95.055642304287
5√n 38.228065426561

Divisors of 81641618

1, 2, 40820809, 81641618

4 divisors

τ Total Divisors 4
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81641617
Sum of the proper positive divisors of n
A Arithmetic Mean 0.25
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 4
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81641618 can be divided by 4 positive divisors. The sum of these divisors (counting 81641618) is 1, the average is 0.25.

Base conversion 81641618

Base System Value
2 Binary 100110111011100000010010010
3 Ternary 12200121211020122
4 Quaternary 10313130002102
5 Quinary 131400012433
6 Senary 12033510242
8 Octal 467340222
10 Decimal 81641618
12 Duodecimal 23412382
16 Hexadecimal 4ddc092
20 Vigesimal 15a540i
36 Base36 1clv2q

Cryptographic Hash Functions

md5 48d282068abefe291071c177a962b7e7
sha1 b8930609f13a59e543ad4b97a0b067bf37179286
sha256 3d96ce71bdfa3096f40a3d7190ec66de7ab4f7edb6ed94fec85e13693541703d
sha512 eaffc0ac995e7f71e48fd24f6e6d94e8801ef17a4445d0876185ca4e815948402672cf6e45572c52f1a33aa66956e4df2cd863a1b25439b6753bb8e9c6d4e0a9
ripemd-160 00e6ada015c35bef427c201a3794150c9110b34b

81641618 as geometric shapes

Circle

Radius = n
Diameter 163283236
Circumference 512969414.67197
Area 2.0939826499166E+16

Sphere

Radius = n
Volume 2.2794150880416E+24
Surface area 8.3759305996665E+16
Circumference 512969414.67197

Square

Length = n
Perimeter 326566472
Area 6665353789657924
Diagonal 115458683.42968

Cube

Length = n
Surface area 39992122737947544
Volume 5.441702679301E+23
Space diagonal 141407430.38813

Equilateral Triangle

Length = n
Perimeter 244924854
Area 2.8861828535273E+15
Altitude 70703715.194065

Triangular Pyramid

Length = n
Surface area 2.8861828535273E+15
Volume 6.413108109558E+22
Height 38486227.809894