631976164 has 12 divisors (see below), whose sum is σ = 1106224000. Its totient is φ = 315912168.

The previous prime is 631976159. The next prime is 631976167. The reversal of 631976164 is 461679136.

631976164 = 5120² + 5121² + ... + 5143².

It is a self number, because there is not a number n which added to its sum of digits gives 631976164.

It is not an unprimeable number, because it can be changed into a prime (631976167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2437 + ... + 35635.

Almost surely, 2^631976164 is an apocalyptic number.

It is an amenable number.

631976164 is a deficient number, since it is larger than the sum of its proper divisors (474247836).

631976164 is a wasteful number, since it uses less digits than its factorization.

631976164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37962 (or 37960 counting only the distinct ones).

The product of its digits is 163296, while the sum is 43.

The square root of 631976164 is about 25139.1361028974. The cubic root of 631976164 is about 858.1572966122.

The spelling of 631976164 in words is "six hundred thirty-one million, nine hundred seventy-six thousand, one hundred sixty-four".