31578470472 has 16 divisors (see below), whose sum is σ = 78946176240. Its totient is φ = 10526156816.

The previous prime is 31578470461. The next prime is 31578470501. The reversal of 31578470472 is 27407487513.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 657884778 + ... + 657884825.

It is an arithmetic number, because the mean of its divisors is an integer number (4934136015).

Almost surely, 2^31578470472 is an apocalyptic number.

It is an amenable number.

31578470472 is an abundant number, since it is smaller than the sum of its proper divisors (47367705768).

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

31578470472 is a wasteful number, since it uses less digits than its factorization.

31578470472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315769612 (or 1315769608 counting only the distinct ones).

The product of its (nonzero) digits is 1317120, while the sum is 48.

The spelling of 31578470472 in words is "thirty-one billion, five hundred seventy-eight million, four hundred seventy thousand, four hundred seventy-two".