631915790139 has 48 divisors (see below), whose sum is σ = 984593750400. Its totient is φ = 389080459008.

The previous prime is 631915790131. The next prime is 631915790153. The reversal of 631915790139 is 931097519136.

631915790139 is a `hidden beast` number, since 6 + 31 + 9 + 1 + 579 + 0 + 1 + 39 = 666.

It is not a de Polignac number, because 631915790139 - 2³ = 631915790131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (631915790131) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5020032 + ... + 5144370.

It is an arithmetic number, because the mean of its divisors is an integer number (20512369800).

Almost surely, 2^631915790139 is an apocalyptic number.

631915790139 is a deficient number, since it is larger than the sum of its proper divisors (352677960261).

631915790139 is a wasteful number, since it uses less digits than its factorization.

631915790139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124984 (or 124981 counting only the distinct ones).

The product of its (nonzero) digits is 1377810, while the sum is 54.

The spelling of 631915790139 in words is "six hundred thirty-one billion, nine hundred fifteen million, seven hundred ninety thousand, one hundred thirty-nine".