631918920632 has 16 divisors (see below), whose sum is σ = 1225704803400. Its totient is φ = 305064306400.

The previous prime is 631918920631. The next prime is 631918920643. The reversal of 631918920632 is 236029819136.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631918920631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1361893994 + ... + 1361894457.

Almost surely, 2^631918920632 is an apocalyptic number.

It is an amenable number.

631918920632 is a deficient number, since it is larger than the sum of its proper divisors (593785882768).

631918920632 is a wasteful number, since it uses less digits than its factorization.

631918920632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2723788486 (or 2723788482 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 50.

The spelling of 631918920632 in words is "six hundred thirty-one billion, nine hundred eighteen million, nine hundred twenty thousand, six hundred thirty-two".