31613152725 has 108 divisors (see below), whose sum is σ = 71129732128. Its totient is φ = 13137854400.

The previous prime is 31613152693. The next prime is 31613152733. The reversal of 31613152725 is 52725131613.

31613152725 is a `hidden beast` number, since 3 + 1 + 613 + 15 + 2 + 7 + 25 = 666.

It is not a de Polignac number, because 31613152725 - 2⁵ = 31613152693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31613152725.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 107634 + ... + 273516.

Almost surely, 2^31613152725 is an apocalyptic number.

31613152725 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31613152725 is an abundant number, since it is smaller than the sum of its proper divisors (39516579403).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31613152725 is a wasteful number, since it uses less digits than its factorization.

31613152725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165928 (or 165909 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The spelling of 31613152725 in words is "thirty-one billion, six hundred thirteen million, one hundred fifty-two thousand, seven hundred twenty-five".