31857794652 has 12 divisors (see below), whose sum is σ = 74334854216. Its totient is φ = 10619264880.

The previous prime is 31857794651. The next prime is 31857794711. The reversal of 31857794652 is 25649775813.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×31857794652² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31857794592 and 31857794601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31857794651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1327408099 + ... + 1327408122.

Almost surely, 2^31857794652 is an apocalyptic number.

It is an amenable number.

31857794652 is an abundant number, since it is smaller than the sum of its proper divisors (42477059564).

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

31857794652 is a wasteful number, since it uses less digits than its factorization.

31857794652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2654816228 (or 2654816226 counting only the distinct ones).

The product of its digits is 12700800, while the sum is 57.

The spelling of 31857794652 in words is "thirty-one billion, eight hundred fifty-seven million, seven hundred ninety-four thousand, six hundred fifty-two".