631257631320 has 32 divisors (see below), whose sum is σ = 1893772894320. Its totient is φ = 168335368320.

The previous prime is 631257631309. The next prime is 631257631337. The reversal of 631257631320 is 23136752136.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2630240011 + ... + 2630240250.

Almost surely, 2^631257631320 is an apocalyptic number.

631257631320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

631257631320 is an abundant number, since it is smaller than the sum of its proper divisors (1262515263000).

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

631257631320 is a wasteful number, since it uses less digits than its factorization.

631257631320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5260480275 (or 5260480271 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 39.

The spelling of 631257631320 in words is "six hundred thirty-one billion, two hundred fifty-seven million, six hundred thirty-one thousand, three hundred twenty".