631671667402400 has 72 divisors (see below), whose sum is σ = 1577930515295904. Its totient is φ = 246792651436800.

The previous prime is 631671667402397. The next prime is 631671667402403. The reversal of 631671667402400 is 4204766176136.

It is an interprime number because it is at equal distance from previous prime (631671667402397) and next prime (631671667402403).

It is not an unprimeable number, because it can be changed into a prime (631671667402403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9181239836 + ... + 9181308635.

It is an arithmetic number, because the mean of its divisors is an integer number (21915701601332).

Almost surely, 2^{631671667402400} is an apocalyptic number.

It is an amenable number.

631671667402400 is an abundant number, since it is smaller than the sum of its proper divisors (946258847893504).

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

631671667402400 is a wasteful number, since it uses less digits than its factorization.

631671667402400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18362548534 (or 18362548521 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 53.

The spelling of 631671667402400 in words is "six hundred thirty-one trillion, six hundred seventy-one billion, six hundred sixty-seven million, four hundred two thousand, four hundred".