81617985 (number)

81617985 is an odd 8-digits composite number following 81617984 and preceding 81617986. In scientific notation, it is written as 8.1617985 × 10^7. The sum of its digits is 45. It has a total of 4 prime factors and 16 positive divisors. There are 43464960 positive integers (up to 81617985) that are relatively prime to 81617985.

Interesting facts

Basic properties

Name

Name eighty-one million six hundred seventeen thousand nine hundred eighty-five

Notation

Scientific notation 8.1617985 × 10^7
Engineering notation 8.1617985 × 10^6

Prime Factorization of 81617985

Prime Factorization 9 × 5 × 1321 × 1373

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81617985
Product of the distinct prime numbers

The prime factorization of 81617985 is 9 × 5 × 1321 × 1373. Since it has a total of 4 prime factors.

Most popular turbo-numbers

2, 6, 31, 64, 439, 491, 3308, 976, 77054, 46705, 731626, 831182, 3204631, 3480142, 17322182, 59317084, 179344653, 108072629, 4541861980, 6374338112

Basic calculations (n = 81617985)

Multiplication

n×y
n×2 163235970
n×3 244853955
n×4 326471940
n×5 408089925

Division

n÷y
n÷2 40808992.5
n÷3 27205995
n÷3 20404496.25
n÷5 16323597

Exponentiation

ny
n2 6661495475460225
n3 5.4369783779368E+23
n4 4.4375521969577E+31
n5 3.6218406864801E+39

Nth Root

y√n
2√n 9034.2672641449
3√n 433.77244082143
4√n 95.048762559777
5√n 38.225851975825

Divisors of 81617985

1, 5, 9, 45, 1321, 1373, 6605, 6865, 11889, 12357, 59445, 61785, 1813733, 9068665, 16323597, 81617985

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 -81617984
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 81617985 can be divided by 16 positive divisors. The sum of these divisors (counting 81617985) is 1, the average is 0.0625.

Base conversion 81617985

Base System Value
2 Binary 100110111010110010001000001
3 Ternary 12200120121211100
4 Quaternary 10313112101001
5 Quinary 131343233420
6 Senary 12033205013
8 Octal 467262101
10 Decimal 81617985
12 Duodecimal 23400769
16 Hexadecimal 4dd6441
20 Vigesimal 15a24j5
36 Base36 1clcu9

Cryptographic Hash Functions

md5 94fbc66df4aa198d7decc5fea8f8001a
sha1 ae772a81ca13e84343b14135c3bbdc6f8b28899f
sha256 ddc11d8d71432d29b0ea35819e3f4c50ae7ce90cce566b280a7372615ccc5704
sha512 17ff5b71723fe32f9bc7b34a0ac823407c6488d953d3297710ef19a562581331579d113aa338e2fbc17a5155e9985d8c248baf4c2691dcf9841e0d17e0600128
ripemd-160 21166203187d91297d6c3571d1f4ccb3ed78b062

81617985 as geometric shapes

Circle

Radius = n
Diameter 163235970
Circumference 512820924.1536
Area 2.0927705247627E+16

Sphere

Radius = n
Volume 2.2774361773137E+24
Surface area 8.371082099051E+16
Circumference 512820924.1536

Square

Length = n
Perimeter 326471940
Area 6661495475460225
Diagonal 115425261.32056

Cube

Length = n
Surface area 39968972852761350
Volume 5.4369783779368E+23
Space diagonal 141366496.83139

Equilateral Triangle

Length = n
Perimeter 244853955
Area 2.8845121544718E+15
Altitude 70683248.415697

Triangular Pyramid

Length = n
Surface area 2.8845121544718E+15
Volume 6.4075404670063E+22
Height 38475087.106855