31870656432 has 90 divisors (see below), whose sum is σ = 94749005988. Its totient is φ = 9998624256.

The previous prime is 31870656371. The next prime is 31870656457. The reversal of 31870656432 is 23465607813.

31870656432 is a `hidden beast` number, since 3 + 1 + 87 + 0 + 6 + 564 + 3 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 341298 + ... + 424529.

Almost surely, 2^31870656432 is an apocalyptic number.

It is an amenable number.

31870656432 is an abundant number, since it is smaller than the sum of its proper divisors (62878349556).

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

31870656432 is a wasteful number, since it uses less digits than its factorization.

31870656432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765875 (or 765849 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 31870656432 in words is "thirty-one billion, eight hundred seventy million, six hundred fifty-six thousand, four hundred thirty-two".