631132621720 has 64 divisors (see below), whose sum is σ = 1456897428000. Its totient is φ = 245977847808.

The previous prime is 631132621709. The next prime is 631132621741. The reversal of 631132621720 is 27126231136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 916635 + ... + 1449994.

Almost surely, 2^631132621720 is an apocalyptic number.

It is an amenable number.

631132621720 is an abundant number, since it is smaller than the sum of its proper divisors (825764806280).

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

631132621720 is a wasteful number, since it uses less digits than its factorization.

631132621720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2366812 (or 2366808 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

Adding to 631132621720 its reverse (27126231136), we get a palindrome (658258852856).

The spelling of 631132621720 in words is "six hundred thirty-one billion, one hundred thirty-two million, six hundred twenty-one thousand, seven hundred twenty".