631788401232 has 80 divisors (see below), whose sum is σ = 1821455830080. Its totient is φ = 209668364928.

The previous prime is 631788401113. The next prime is 631788401243. The reversal of 631788401232 is 232104887136.

631788401232 is a `hidden beast` number, since 6 + 3 + 1 + 7 + 8 + 8 + 401 + 232 = 666.

It is a congruent number.

It is an unprimeable number.

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, 3123243 + ... + 3319370.

It is an arithmetic number, because the mean of its divisors is an integer number (22768197876).

Almost surely, 2^631788401232 is an apocalyptic number.

It is an amenable number.

631788401232 is an abundant number, since it is smaller than the sum of its proper divisors (1189667428848).

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

631788401232 is a wasteful number, since it uses less digits than its factorization.

631788401232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6442857 (or 6442845 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 631788401232 in words is "six hundred thirty-one billion, seven hundred eighty-eight million, four hundred one thousand, two hundred thirty-two".