631009064644 has 12 divisors (see below), whose sum is σ = 1262018129344. Its totient is φ = 270432456264.

The previous prime is 631009064611. The next prime is 631009064663. The reversal of 631009064644 is 446460900136.

631009064644 is an admirable number.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 631009064644.

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, 11268018984 + ... + 11268019039.

Almost surely, 2^631009064644 is an apocalyptic number.

It is an amenable number.

631009064644 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

631009064644 is a wasteful number, since it uses less digits than its factorization.

631009064644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22536038034 (or 22536038032 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 43.

The spelling of 631009064644 in words is "six hundred thirty-one billion, nine million, sixty-four thousand, six hundred forty-four".