12523139631 has 24 divisors (see below), whose sum is σ = 18398516864. Its totient is φ = 8206090560.

The previous prime is 12523139611. The next prime is 12523139653. The reversal of 12523139631 is 13693132521.

12523139631 is a `hidden beast` number, since 1 + 2 + 5 + 2 + 3 + 13 + 9 + 631 = 666.

It is not a de Polignac number, because 12523139631 - 2²³ = 12514751023 is a prime.

It is a super-2 number, since 2×12523139631² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12523139611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 853005 + ... + 867561.

Almost surely, 2^12523139631 is an apocalyptic number.

12523139631 is a deficient number, since it is larger than the sum of its proper divisors (5875377233).

12523139631 is a wasteful number, since it uses less digits than its factorization.

12523139631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16191 (or 16188 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The spelling of 12523139631 in words is "twelve billion, five hundred twenty-three million, one hundred thirty-nine thousand, six hundred thirty-one".