161445820 is an even 9-digits composite number following 161445819
and preceding 161445821 . In scientific notation, it is written as 1.61445820 × 10^8.
The sum of its digits is 31. It has a total of 4 prime factors and 12 positive divisors.
There are 64578320 positive integers (up to 161445820) that are relatively prime to 161445820.
161445820 has 12 divisors, whose sum is 339036264
The reverse of 161445820 is 028544161
Previous prime number is 5
Is Prime? no Number parity even Number length 9 Sum of Digits 31 Digital Root 4
Name
one hundred sixty-one million four hundred forty-five thousand eight hundred twenty
Scientific notation
1.61445820 × 10^8
Engineering notation
1.61445820 × 10^6
Prime Factorization
2 × 2 × 5 × 8072291
Composite number
ω Distinct Factors
3 Total number of distinct prime factors
Ω Total Factors
4 Total number of prime factors
rad Radical
80722910 Product of the distinct prime numbers
The prime factorization of 161445820 is 2 × 2 × 5 × 8072291.
Since it has a total of 4 prime factors.
5 , 4 , 5 , 6 , 706 , 805 , 9779 , 7077 , 84079 , 77763 , 111053 , 320490 , 9233460 , 6666134 , 84956142 , 86486855 , 650403680 , 779150162 , 6291187636 , 6486953454
n×2
322891640
n×3
484337460
n×4
645783280
n×5
807229100
n÷2
80722910
n÷3
53815273.333333
n÷3
40361455
n÷5
32289164
n2
26064752795472400
n3
4.2080453881623E+24
n4
6.7937133828909E+32
n5
1.0968166279458E+41
2 √n12706.133164736
3 √n544.51385540455
4 √n112.72148492961
5 √n43.813239039784
1 , 2 , 4 , 5 , 10 , 20 , 8072291 , 16144582 , 32289164 , 40361455 , 80722910 , 161445820
12 divisors
τ Total Divisors
12 Total number of the positive divisors of n
σ Sum of Divisors
1 Sum of all the positive divisors of n
s Aliquot Sum
-161445819 Sum of the proper positive divisors of n
A Arithmetic Mean
0.083333333333333 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
12 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 161445820 can be divided by 12 positive divisors.
The sum of these divisors (counting 161445820) is 1, the average is 0.083333333333333.
Base
System
Value
2
Binary
1001100111110111011110111100
3
Ternary
102020210022000211
4
Quaternary
21213313132330
5
Quinary
312312231240
6
Senary
24004202204
8
Octal
1147673674
10
Decimal
161445820
12
Duodecimal
46099364
16
Hexadecimal
99f77bc
20
Vigesimal
2a90eb0
36
Base36
2o4ce4
md5
6cebbf15646c6f6e3986b01d01269b8f
sha1
3148def8098c0e33e7d249dbf2daa8bb8cb2bdb8
sha256
7432ff4f5c1770982c31de5cef10c26760181409cfbab5d7aba43cff9102fe29
sha512
ed15d35e4922d72ae3eb0415b99841d706a2650c58b378d492ac6be41d45e69ae545ba7c5c08aceea769dea38457ee4c625ac2466ce3154538513829dfeef649
ripemd-160
0e0d42a332d11008d6dca6f3c1b78c1cb32c940f
Diameter
322891640
Circumference
1014394004.1296
Area
8.188483589989E+16
Volume
1.7626619303231E+25
Surface area
3.2753934359956E+17
Circumference
1014394004.1296
Perimeter
645783280
Area
26064752795472400
Diagonal
228318868.23245
Surface area
156388516772834400
Volume
4.2080453881623E+24
Space diagonal
279632362.90962
Perimeter
484337460
Area
1.128636903212E+16
Altitude
139816181.45481
Surface area
1.128636903212E+16
Volume
4.9592290491839E+23
Height
76106289.410815