31899630788368 has 240 divisors, whose sum is σ = 76783368407040. Its totient is φ = 12756025110528.

The previous prime is 31899630788359. The next prime is 31899630788387. The reversal of 31899630788368 is 86388703699813.

It is a Smith number, since the sum of its digits (79) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2469578646 + ... + 2469591562.

It is an arithmetic number, because the mean of its divisors is an integer number (319930701696).

Almost surely, 2^{31899630788368} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31899630788368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38391684203520).

31899630788368 is an abundant number, since it is smaller than the sum of its proper divisors (44883737618672).

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

31899630788368 is a wasteful number, since it uses less digits than its factorization.

31899630788368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14542 (or 14529 counting only the distinct ones).

The product of its (nonzero) digits is 2257403904, while the sum is 79.

The spelling of 31899630788368 in words is "thirty-one trillion, eight hundred ninety-nine billion, six hundred thirty million, seven hundred eighty-eight thousand, three hundred sixty-eight".