631879477108 has 24 divisors (see below), whose sum is σ = 1207900600704. Its totient is φ = 286840507200.

The previous prime is 631879477091. The next prime is 631879477111. The reversal of 631879477108 is 801774978136.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9402060 + ... + 9469027.

It is an arithmetic number, because the mean of its divisors is an integer number (50329191696).

Almost surely, 2^631879477108 is an apocalyptic number.

It is an amenable number.

631879477108 is a deficient number, since it is larger than the sum of its proper divisors (576021123596).

631879477108 is a wasteful number, since it uses less digits than its factorization.

631879477108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18871863 (or 18871861 counting only the distinct ones).

The product of its (nonzero) digits is 14224896, while the sum is 61.

The spelling of 631879477108 in words is "six hundred thirty-one billion, eight hundred seventy-nine million, four hundred seventy-seven thousand, one hundred eight".