631400881904 has 40 divisors (see below), whose sum is σ = 1359940374912. Its totient is φ = 282015279360.

The previous prime is 631400881889. The next prime is 631400881921. The reversal of 631400881904 is 409188004136.

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, 48954539 + ... + 48967434.

Almost surely, 2^631400881904 is an apocalyptic number.

It is an amenable number.

631400881904 is an abundant number, since it is smaller than the sum of its proper divisors (728539493008).

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

631400881904 is a wasteful number, since it uses less digits than its factorization.

631400881904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97922025 (or 97922019 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 44.

The spelling of 631400881904 in words is "six hundred thirty-one billion, four hundred million, eight hundred eighty-one thousand, nine hundred four".