631637958068 has 192 divisors, whose sum is σ = 1363334353920. Its totient is φ = 252978536448.

The previous prime is 631637958041. The next prime is 631637958071. The reversal of 631637958068 is 860859736136.

It is a self number, because there is not a number n which added to its sum of digits gives 631637958068.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 81995105 + ... + 82002807.

It is an arithmetic number, because the mean of its divisors is an integer number (7100699760).

Almost surely, 2^631637958068 is an apocalyptic number.

631637958068 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

631637958068 is an abundant number, since it is smaller than the sum of its proper divisors (731696395852).

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

631637958068 is a wasteful number, since it uses less digits than its factorization.

631637958068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7906 (or 7904 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 62.

The spelling of 631637958068 in words is "six hundred thirty-one billion, six hundred thirty-seven million, nine hundred fifty-eight thousand, sixty-eight".