31977715880894 has 16 divisors (see below), whose sum is σ = 55569885916128. Its totient is φ = 13516999276032.

The previous prime is 31977715880743. The next prime is 31977715880933. The reversal of 31977715880894 is 49808851777913.

It is a Curzon number.

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, 15644674067 + ... + 15644676110.

It is an arithmetic number, because the mean of its divisors is an integer number (3473117869758).

Almost surely, 2^{31977715880894} is an apocalyptic number.

31977715880894 is a deficient number, since it is larger than the sum of its proper divisors (23592170035234).

31977715880894 is a wasteful number, since it uses less digits than its factorization.

31977715880894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31289350259.

The product of its (nonzero) digits is 853493760, while the sum is 77.

The spelling of 31977715880894 in words is "thirty-one trillion, nine hundred seventy-seven billion, seven hundred fifteen million, eight hundred eighty thousand, eight hundred ninety-four".