31347731656 has 64 divisors (see below), whose sum is σ = 61861968000. Its totient is φ = 14872112640.

The previous prime is 31347731651. The next prime is 31347731669. The reversal of 31347731656 is 65613774313.

It is not an unprimeable number, because it can be changed into a prime (31347731651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3443671 + ... + 3452761.

It is an arithmetic number, because the mean of its divisors is an integer number (966593250).

Almost surely, 2^31347731656 is an apocalyptic number.

It is an amenable number.

31347731656 is a deficient number, since it is larger than the sum of its proper divisors (30514236344).

31347731656 is a wasteful number, since it uses less digits than its factorization.

31347731656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9382 (or 9378 counting only the distinct ones).

The product of its digits is 952560, while the sum is 46.

The spelling of 31347731656 in words is "thirty-one billion, three hundred forty-seven million, seven hundred thirty-one thousand, six hundred fifty-six".