631812515628 has 96 divisors (see below), whose sum is σ = 1719940633600. Its totient is φ = 180441959040.

The previous prime is 631812515627. The next prime is 631812515707. The reversal of 631812515628 is 826515218136.

It is not an unprimeable number, because it can be changed into a prime (631812515627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10147833 + ... + 10209903.

Almost surely, 2^631812515628 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 631812515628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (859970316800).

631812515628 is an abundant number, since it is smaller than the sum of its proper divisors (1088128117972).

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

631812515628 is a wasteful number, since it uses less digits than its factorization.

631812515628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64572 (or 64556 counting only the distinct ones).

The product of its digits is 691200, while the sum is 48.

The spelling of 631812515628 in words is "six hundred thirty-one billion, eight hundred twelve million, five hundred fifteen thousand, six hundred twenty-eight".