12155972079 has 16 divisors (see below), whose sum is σ = 16770124800. Its totient is φ = 7823009376.

The previous prime is 12155972033. The next prime is 12155972093. The reversal of 12155972079 is 97027955121.

It is a happy number.

It is not a de Polignac number, because 12155972079 - 2¹² = 12155967983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12155972099) 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, 586902 + ... + 607260.

It is an arithmetic number, because the mean of its divisors is an integer number (1048132800).

Almost surely, 2^12155972079 is an apocalyptic number.

12155972079 is a deficient number, since it is larger than the sum of its proper divisors (4614152721).

12155972079 is a wasteful number, since it uses less digits than its factorization.

12155972079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27254.

The product of its (nonzero) digits is 396900, while the sum is 48.

The spelling of 12155972079 in words is "twelve billion, one hundred fifty-five million, nine hundred seventy-two thousand, seventy-nine".