31315616668 has 24 divisors (see below), whose sum is σ = 62636861952. Its totient is φ = 13419772464.

The previous prime is 31315616653. The next prime is 31315616701. The reversal of 31315616668 is 86661651313.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312921 + ... + 400687.

It is an arithmetic number, because the mean of its divisors is an integer number (2609869248).

Almost surely, 2^31315616668 is an apocalyptic number.

It is an amenable number.

31315616668 is an abundant number, since it is smaller than the sum of its proper divisors (31321245284).

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

31315616668 is a wasteful number, since it uses less digits than its factorization.

31315616668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100521 (or 100519 counting only the distinct ones).

The product of its digits is 466560, while the sum is 46.

The spelling of 31315616668 in words is "thirty-one billion, three hundred fifteen million, six hundred sixteen thousand, six hundred sixty-eight".