12539364985 has 32 divisors (see below), whose sum is σ = 18246850560. Its totient is φ = 8075553792.

The previous prime is 12539364983. The next prime is 12539365043. The reversal of 12539364985 is 58946393521.

It is not a de Polignac number, because 12539364985 - 2¹ = 12539364983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12539364983) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 263007 + ... + 307003.

It is an arithmetic number, because the mean of its divisors is an integer number (570214080).

Almost surely, 2^12539364985 is an apocalyptic number.

It is an amenable number.

12539364985 is a deficient number, since it is larger than the sum of its proper divisors (5707485575).

12539364985 is a wasteful number, since it uses less digits than its factorization.

12539364985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44505.

The product of its digits is 6998400, while the sum is 55.

The spelling of 12539364985 in words is "twelve billion, five hundred thirty-nine million, three hundred sixty-four thousand, nine hundred eighty-five".