12539608137 has 20 divisors (see below), whose sum is σ = 21408009216. Its totient is φ = 7165490040.

The previous prime is 12539608127. The next prime is 12539608139. The reversal of 12539608137 is 73180693521.

12539608137 is a `hidden beast` number, since 1 + 2 + 5 + 3 + 9 + 608 + 1 + 37 = 666.

It is not a de Polignac number, because 12539608137 - 2⁴ = 12539608121 is a prime.

It is a super-2 number, since 2×12539608137² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12539608092 and 12539608101.

It is not an unprimeable number, because it can be changed into a prime (12539608139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11057289 + ... + 11058422.

Almost surely, 2^12539608137 is an apocalyptic number.

It is an amenable number.

12539608137 is a deficient number, since it is larger than the sum of its proper divisors (8868401079).

12539608137 is an equidigital number, since it uses as much as digits as its factorization.

12539608137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22115730 (or 22115721 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 12539608137 in words is "twelve billion, five hundred thirty-nine million, six hundred eight thousand, one hundred thirty-seven".