65 (number)

65 is an odd 2-digits composite number following 64 and preceding 66. In scientific notation, it is written as 6.5 × 10^1. The sum of its digits is 11. It has a total of 2 prime factors and 4 positive divisors. There are 48 positive integers (up to 65) that are relatively prime to 65.

Interesting facts

Basic properties

Name

Name sixty-five

Notation

Scientific notation 6.5 × 10^1
Engineering notation 6.5 × 10^0

Prime Factorization of 65

Prime Factorization 5 × 13

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 65
Product of the distinct prime numbers

The prime factorization of 65 is 5 × 13. Since it has a total of 2 prime factors.

Most popular turbo-numbers

3, 6, 55, 85, 536, 339, 5326, 5096, 65545, 36762, 522722, 173820, 6785553, 4224656, 3782309, 64683575, 71567224, 526335475, 1256538846, 3171670325

Basic calculations (n = 65)

Multiplication

n×y
n×2 130
n×3 195
n×4 260
n×5 325

Division

n÷y
n÷2 32.5
n÷3 21.666666666667
n÷3 16.25
n÷5 13

Exponentiation

ny
n2 4225
n3 274625
n4 17850625
n5 1160290625

Nth Root

y√n
2√n 8.0622577482985
3√n 4.0207257585891
4√n 2.8394115144337
5√n 2.3045316198021

Divisors of 65

1, 5, 13, 65

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 -64
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 65 can be divided by 4 positive divisors. The sum of these divisors (counting 65) is 1, the average is 0.25.

Base conversion 65

Base System Value
2 Binary 1000001
3 Ternary 2102
4 Quaternary 1001
5 Quinary 230
6 Senary 145
8 Octal 101
10 Decimal 65
12 Duodecimal 55
16 Hexadecimal 41
20 Vigesimal 35
36 Base36 1t

Cryptographic Hash Functions

md5 fc490ca45c00b1249bbe3554a4fdf6fb
sha1 2a459380709e2fe4ac2dae5733c73225ff6cfee1
sha256 108c995b953c8a35561103e2014cf828eb654a99e310f87fab94c2f4b7d2a04f
sha512 ac7ee5c6be94adc321477d6cd10c8d156d1b521fc8fbb8557e78667b4182f428a2d1e4fcc89b460e1c1f5b08d8539b9c5c0e5e357cd605d9687fb0687ff63b31
ripemd-160 2284dbd9213c60f1fb2a493fab9134e3aed2686f

65 as geometric shapes

Circle

Radius = n
Diameter 130
Circumference 408.40704496667
Area 13273.228961417

Sphere

Radius = n
Volume 1150346.5099895
Surface area 53092.915845668
Circumference 408.40704496667

Square

Length = n
Perimeter 260
Area 4225
Diagonal 91.923881554251

Cube

Length = n
Surface area 25350
Volume 274625
Space diagonal 112.58330249198

Equilateral Triangle

Length = n
Perimeter 195
Area 1829.4786654946
Altitude 56.291651245989

Triangular Pyramid

Length = n
Surface area 1829.4786654946
Volume 32364.866630559
Height 30.641293851417