81661586 is an even 8-digits composite number following 81661585
and preceding 81661587 . In scientific notation, it is written as 8.1661586 × 10^7.
The sum of its digits is 41. It has a total of 4 prime factors and 16 positive divisors.
There are 39753600 positive integers (up to 81661586) that are relatively prime to 81661586.
81661586 has 16 divisors, whose sum is 125736408
The reverse of 81661586 is 68516618
Previous prime number is 821
Is Prime? no
Number parity even
Number length 8
Sum of Digits 41
Digital Root 5
Name
eighty-one million six hundred sixty-one thousand five hundred eighty-six
Scientific notation
8.1661586 × 10^7
Engineering notation
8.1661586 × 10^6
Prime Factorization
2 × 41 × 821 × 1213
Composite number
ω
Distinct Factors
4
Total number of distinct prime factors
Ω
Total Factors
4
Total number of prime factors
rad
Radical
81661586
Product of the distinct prime numbers
The prime factorization of 81661586 is 2 × 41 × 821 × 1213.
Since it has a total of 4 prime factors.
6 , 7 , 8 , 81 , 972 , 164 , 553 , 62 , 40508 , 42461 , 92024 , 520512 , 8432372 , 1665850 , 70162827 , 11027881 , 741070804 , 375798100 , 3880113223 , 2422160784
n×2
163323172
n×3
244984758
n×4
326646344
n×5
408307930
n÷2
40830793
n÷3
27220528.666667
n÷3
20415396.5
n÷5
16332317.2
n2
6668614628035396
n3
5.4456964694817E+23
n4
4.4470421057248E+31
n5
3.6315251136226E+39
2 √n
9036.6800319586
3 √n
433.84966867499
4 √n
95.061453975619
5 √n
38.229935216408
1 , 2 , 41 , 82 , 821 , 1213 , 1642 , 2426 , 33661 , 49733 , 67322 , 99466 , 995873 , 1991746 , 40830793 , 81661586
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
-81661585
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 81661586 can be divided by 16 positive divisors.
The sum of these divisors (counting 81661586) is 1, the average is 0.0625.
Base
System
Value
2
Binary
100110111100000111010010010
3
Ternary
12200122211122012
4
Quaternary
10313200322102
5
Quinary
131401132321
6
Senary
12034142522
8
Octal
467407222
10
Decimal
81661586
12
Duodecimal
23421a42
16
Hexadecimal
4de0e92
20
Vigesimal
15a7dj6
36
Base36
1cmahe
md5
e2a71dd4e38ecbfcc8ab25ee175a0ce2
sha1
a8ec73e664cc26d0aa2dd447c53b62c21091087e
sha256
3e181cbf8edb4ca82b4915d6e7681e352945c53594a4ed031fcf210e04546119
sha512
5f2840aa5c3413974dc5b33914613a9433efbcc868584a87f1e5bf6d8481f5b62b2c57718f5768beffc7f4b28aa3f3e2024a1c409674f90761652335867ed328
ripemd-160
1bf037c29d13e9cf40a945e91ea6f5fd5f4e2862
Diameter
163323172
Circumference
513094877.31618
Area
2.0950070725057E+16
Volume
2.2810880029605E+24
Surface area
8.380028290023E+16
Circumference
513094877.31618
Perimeter
326646344
Area
6668614628035396
Diagonal
115486922.4461
Surface area
40011687768212376
Volume
5.4456964694817E+23
Space diagonal
141442015.97866
Perimeter
244984758
Area
2.8875948379636E+15
Altitude
70721007.989328
Surface area
2.8875948379636E+15
Volume
6.4178148364236E+22
Height
38495640.815366