31610699728872 has 64 divisors (see below), whose sum is σ = 87179662238400. Its totient is φ = 9471370698240.

The previous prime is 31610699728787. The next prime is 31610699728919. The reversal of 31610699728872 is 27882799601613.

It is a junction number, because it is equal to n+sod(n) for n = 31610699728797 and 31610699728806.

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, 672659083 + ... + 672706074.

It is an arithmetic number, because the mean of its divisors is an integer number (1362182222475).

Almost surely, 2^{31610699728872} is an apocalyptic number.

It is an amenable number.

31610699728872 is an abundant number, since it is smaller than the sum of its proper divisors (55568962509528).

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

31610699728872 is a wasteful number, since it uses less digits than its factorization.

31610699728872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345365266 (or 1345365262 counting only the distinct ones).

The product of its (nonzero) digits is 109734912, while the sum is 69.

The spelling of 31610699728872 in words is "thirty-one trillion, six hundred ten billion, six hundred ninety-nine million, seven hundred twenty-eight thousand, eight hundred seventy-two".