31871728576016 has 80 divisors (see below), whose sum is σ = 74889671040000. Its totient is φ = 12843981093504.

The previous prime is 31871728575989. The next prime is 31871728576033. The reversal of 31871728576016 is 61067582717813.

It is a self number, because there is not a number n which added to its sum of digits gives 31871728576016.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104700266 + ... + 105004233.

It is an arithmetic number, because the mean of its divisors is an integer number (936120888000).

Almost surely, 2^{31871728576016} is an apocalyptic number.

It is an amenable number.

31871728576016 is an abundant number, since it is smaller than the sum of its proper divisors (43017942463984).

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

31871728576016 is a wasteful number, since it uses less digits than its factorization.

31871728576016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209704596 (or 209704590 counting only the distinct ones).

The product of its (nonzero) digits is 23708160, while the sum is 62.

The spelling of 31871728576016 in words is "thirty-one trillion, eight hundred seventy-one billion, seven hundred twenty-eight million, five hundred seventy-six thousand, sixteen".