12539007817 has 16 divisors (see below), whose sum is σ = 14428402560. Its totient is φ = 10674292608.

The previous prime is 12539007799. The next prime is 12539007829. The reversal of 12539007817 is 71870093521.

It is a de Polignac number, because none of the positive numbers 2^k-12539007817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12539007517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1067983 + ... + 1079659.

It is an arithmetic number, because the mean of its divisors is an integer number (901775160).

Almost surely, 2^12539007817 is an apocalyptic number.

It is an amenable number.

12539007817 is a deficient number, since it is larger than the sum of its proper divisors (1889394743).

12539007817 is a wasteful number, since it uses less digits than its factorization.

12539007817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12720.

The product of its (nonzero) digits is 105840, while the sum is 43.

The spelling of 12539007817 in words is "twelve billion, five hundred thirty-nine million, seven thousand, eight hundred seventeen".