631515481536 has 56 divisors (see below), whose sum is σ = 1670962967440. Its totient is φ = 210495301632.

The previous prime is 631515481507. The next prime is 631515481561. The reversal of 631515481536 is 635184515136.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4852710 + ... + 4981146.

Almost surely, 2^631515481536 is an apocalyptic number.

It is an amenable number.

631515481536 is an abundant number, since it is smaller than the sum of its proper divisors (1039447485904).

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

631515481536 is a wasteful number, since it uses less digits than its factorization.

631515481536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154061 (or 154051 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 48.

The spelling of 631515481536 in words is "six hundred thirty-one billion, five hundred fifteen million, four hundred eighty-one thousand, five hundred thirty-six".