631995996 has 12 divisors (see below), whose sum is σ = 1474657352. Its totient is φ = 210665328.

The previous prime is 631995979. The next prime is 631996003. The reversal of 631995996 is 699599136.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26333155 + ... + 26333178.

Almost surely, 2^631995996 is an apocalyptic number.

It is an amenable number.

631995996 is an abundant number, since it is smaller than the sum of its proper divisors (842661356).

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

631995996 is a wasteful number, since it uses less digits than its factorization.

631995996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52666340 (or 52666338 counting only the distinct ones).

The product of its digits is 3542940, while the sum is 57.

The square root of 631995996 is about 25139.5305445428. The cubic root of 631995996 is about 858.1662731097.

The spelling of 631995996 in words is "six hundred thirty-one million, nine hundred ninety-five thousand, nine hundred ninety-six".