Base | Representation |
---|---|
bin | 10111010010001000… |
… | …10011000011001000 |
3 | 1012021011020112121212 |
4 | 23221010103003020 |
5 | 201100014340040 |
6 | 5424213352252 |
7 | 621523354232 |
oct | 135104230310 |
9 | 35234215555 |
10 | 12500152520 |
11 | 5335012669 |
12 | 250a338688 |
13 | 124297116b |
14 | 868213252 |
15 | 4d2618d65 |
hex | 2e91130c8 |
12500152520 has 64 divisors (see below), whose sum is σ = 28914937200. Its totient is φ = 4859965440.
The previous prime is 12500152471. The next prime is 12500152523. The reversal of 12500152520 is 2525100521.
It can be written as a sum of positive squares in 8 ways, for example, as 7716216964 + 4783935556 = 87842^2 + 69166^2 .
It is not an unprimeable number, because it can be changed into a prime (12500152523) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1667180 + ... + 1674660.
Almost surely, 212500152520 is an apocalyptic number.
12500152520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 12500152520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14457468600).
12500152520 is an abundant number, since it is smaller than the sum of its proper divisors (16414784680).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12500152520 is a wasteful number, since it uses less digits than its factorization.
12500152520 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 8658 (or 8654 counting only the distinct ones).
The product of its (nonzero) digits is 1000, while the sum is 23.
The spelling of 12500152520 in words is "twelve billion, five hundred million, one hundred fifty-two thousand, five hundred twenty".
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