161808985 is an odd 9-digits composite number following 161808984
and preceding 161808986 . In scientific notation, it is written as 1.61808985 × 10^8.
The sum of its digits is 46. It has a total of 4 prime factors and 16 positive divisors.
There are 117973440 positive integers (up to 161808985) that are relatively prime to 161808985.
161808985 has 16 divisors, whose sum is 211760640
The reverse of 161808985 is 589808161
Previous prime number is 79
Is Prime? no Number parity odd Number length 9 Sum of Digits 46 Digital Root 1
Name
one hundred sixty-one million eight hundred eight thousand nine hundred eighty-five
Scientific notation
1.61808985 × 10^8
Engineering notation
1.61808985 × 10^6
Prime Factorization
5 × 13 × 79 × 31511
Composite number
ω Distinct Factors
4 Total number of distinct prime factors
Ω Total Factors
4 Total number of prime factors
rad Radical
161808985 Product of the distinct prime numbers
The prime factorization of 161808985 is 5 × 13 × 79 × 31511.
Since it has a total of 4 prime factors.
4 , 2 , 80 , 63 , 828 , 668 , 3047 , 2603 , 30271 , 36394 , 625149 , 928871 , 5003316 , 3076387 , 97611878 , 90935662 , 20825246 , 490430735 , 6287032271 , 5807208487
n×2
323617970
n×3
485426955
n×4
647235940
n×5
809044925
n÷2
80904492.5
n÷3
53936328.333333
n÷3
40452246.25
n÷5
32361797
n2
26182147626730225
n3
4.2365067326014E+24
n4
6.855048543479E+32
n5
1.1092084469461E+41
2 √n12720.416070239
3 √n544.92183599726
4 √n112.78482198523
5 √n43.832932504043
1 , 5 , 13 , 65 , 79 , 395 , 1027 , 5135 , 31511 , 157555 , 409643 , 2048215 , 2489369 , 12446845 , 32361797 , 161808985
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
-161808984 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 161808985 can be divided by 16 positive divisors.
The sum of these divisors (counting 161808985) is 1, the average is 0.0625.
Base
System
Value
2
Binary
1001101001010000001001011001
3
Ternary
102021110202012101
4
Quaternary
21221100021121
5
Quinary
312410341420
6
Senary
24020043401
8
Octal
1151201131
10
Decimal
161808985
12
Duodecimal
46233561
16
Hexadecimal
9a50259
20
Vigesimal
2ab6295
36
Base36
2oc4m1
md5
c26e1a42806e0012bf90e4a5f614354a
sha1
f29ca6c127175de08e50a5c3a523fe4a305dfa53
sha256
32e387dfa684a5e01d25abd040a11d1cff1f58c483227e2b5cc64b566755532f
sha512
3c5ff4fa20e3e7e477264ab5323c0f6cb3340c4c88e220f4fa70d0b1ea58ebf5e8134281c0acaf1a3ef389e5baaf5a2d59211c1d87ddf9d2f370b7fad046f186
ripemd-160
f8ed74e76811c556fd958000a7ddbf0b6722e1fb
Diameter
323617970
Circumference
1016675837.1216
Area
8.2253642639339E+16
Volume
1.7745837904032E+25
Surface area
3.2901457055736E+17
Circumference
1016675837.1216
Perimeter
647235940
Area
26182147626730225
Diagonal
228832461.10082
Surface area
157092885760381350
Volume
4.2365067326014E+24
Space diagonal
280261383.14115
Perimeter
485426955
Area
1.1337202485191E+16
Altitude
140130691.57058
Surface area
1.1337202485191E+16
Volume
4.9927710652748E+23
Height
76277487.033608