12656439115 has 16 divisors (see below), whose sum is σ = 15721166880. Its totient is φ = 9769957120.

The previous prime is 12656439083. The next prime is 12656439119. The reversal of 12656439115 is 51193465621.

It is not a de Polignac number, because 12656439115 - 2⁵ = 12656439083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12656439119) 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, 215535 + ... + 267895.

It is an arithmetic number, because the mean of its divisors is an integer number (982572930).

Almost surely, 2^12656439115 is an apocalyptic number.

12656439115 is a deficient number, since it is larger than the sum of its proper divisors (3064727765).

12656439115 is a wasteful number, since it uses less digits than its factorization.

12656439115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54062.

The product of its digits is 194400, while the sum is 43.

The spelling of 12656439115 in words is "twelve billion, six hundred fifty-six million, four hundred thirty-nine thousand, one hundred fifteen".