31147688016 has 60 divisors (see below), whose sum is σ = 87984984672. Its totient is φ = 10285524288.

The previous prime is 31147687993. The next prime is 31147688021. The reversal of 31147688016 is 61088674113.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 995356 + ... + 1026171.

Almost surely, 2^31147688016 is an apocalyptic number.

31147688016 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

31147688016 is an abundant number, since it is smaller than the sum of its proper divisors (56837296656).

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

31147688016 is a wasteful number, since it uses less digits than its factorization.

31147688016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2021648 (or 2021639 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 31147688016 in words is "thirty-one billion, one hundred forty-seven million, six hundred eighty-eight thousand, sixteen".