631256438752 has 24 divisors (see below), whose sum is σ = 1242999324000. Its totient is φ = 315574070784.

The previous prime is 631256438741. The next prime is 631256438753. The reversal of 631256438752 is 257834652136.

It is a self number, because there is not a number n which added to its sum of digits gives 631256438752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631256438753) 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, 1502377 + ... + 1876072.

It is an arithmetic number, because the mean of its divisors is an integer number (51791638500).

Almost surely, 2^631256438752 is an apocalyptic number.

It is an amenable number.

631256438752 is a deficient number, since it is larger than the sum of its proper divisors (611742885248).

631256438752 is a wasteful number, since it uses less digits than its factorization.

631256438752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3384298 (or 3384290 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 52.

The spelling of 631256438752 in words is "six hundred thirty-one billion, two hundred fifty-six million, four hundred thirty-eight thousand, seven hundred fifty-two".