631456956 has 72 divisors (see below), whose sum is σ = 1725525984. Its totient is φ = 193553280.

The previous prime is 631456921. The next prime is 631456961. The reversal of 631456956 is 659654136.

631456956 is a `hidden beast` number, since 6 + 31 + 4 + 569 + 56 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 127201 + ... + 132071.

Almost surely, 2^631456956 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 631456956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (862762992).

631456956 is an abundant number, since it is smaller than the sum of its proper divisors (1094069028).

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

631456956 is a wasteful number, since it uses less digits than its factorization.

631456956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5171 (or 5166 counting only the distinct ones).

The product of its digits is 583200, while the sum is 45.

The square root of 631456956 is about 25128.8072936222. The cubic root of 631456956 is about 857.9222222355.

The spelling of 631456956 in words is "six hundred thirty-one million, four hundred fifty-six thousand, nine hundred fifty-six".