31968934692478 has 72 divisors (see below), whose sum is σ = 56774113427304. Its totient is φ = 13458060604800.

The previous prime is 31968934692473. The next prime is 31968934692481. The reversal of 31968934692478 is 87429643986913.

It is a junction number, because it is equal to n+sod(n) for n = 31968934692398 and 31968934692407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31968934692473) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3912483333 + ... + 3912491503.

It is an arithmetic number, because the mean of its divisors is an integer number (788529353157).

Almost surely, 2^{31968934692478} is an apocalyptic number.

31968934692478 is a deficient number, since it is larger than the sum of its proper divisors (24805178734826).

31968934692478 is an frugal number, since it uses more digits than its factorization.

31968934692478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9866 (or 9050 counting only the distinct ones).

The product of its digits is 3386105856, while the sum is 79.

The spelling of 31968934692478 in words is "thirty-one trillion, nine hundred sixty-eight billion, nine hundred thirty-four million, six hundred ninety-two thousand, four hundred seventy-eight".