12115660239 has 16 divisors (see below), whose sum is σ = 18287791200. Its totient is φ = 7924707648.

The previous prime is 12115660237. The next prime is 12115660243. The reversal of 12115660239 is 93206651121.

12115660239 is a `hidden beast` number, since 1 + 2 + 1 + 15 + 6 + 602 + 39 = 666.

It is not a de Polignac number, because 12115660239 - 2¹ = 12115660237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12115660231) 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, 4231854 + ... + 4234715.

It is an arithmetic number, because the mean of its divisors is an integer number (1142986950).

Almost surely, 2^12115660239 is an apocalyptic number.

12115660239 is a deficient number, since it is larger than the sum of its proper divisors (6172130961).

12115660239 is an equidigital number, since it uses as much as digits as its factorization.

12115660239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8466631 (or 8466625 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The spelling of 12115660239 in words is "twelve billion, one hundred fifteen million, six hundred sixty thousand, two hundred thirty-nine".