631645632 has 84 divisors (see below), whose sum is σ = 1814739576. Its totient is φ = 210055680.

The previous prime is 631645627. The next prime is 631645657. The reversal of 631645632 is 236546136.

631645632 is a `hidden beast` number, since 6 + 3 + 1 + 645 + 6 + 3 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 310603 + ... + 312629.

Almost surely, 2^631645632 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 631645632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (907369788).

631645632 is an abundant number, since it is smaller than the sum of its proper divisors (1183093944).

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

631645632 is a wasteful number, since it uses less digits than its factorization.

631645632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2586 (or 2573 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 631645632 is about 25132.5611906149. The cubic root of 631645632 is about 858.0076612679.

The spelling of 631645632 in words is "six hundred thirty-one million, six hundred forty-five thousand, six hundred thirty-two".