12185864279 has 2 divisors, whose sum is σ = 12185864280. Its totient is φ = 12185864278.

The previous prime is 12185864269. The next prime is 12185864281. The reversal of 12185864279 is 97246858121.

12185864279 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12185864279 - 2²⁰ = 12184815703 is a prime.

Together with 12185864281, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12185864279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12185864219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6092932139 + 6092932140.

It is an arithmetic number, because the mean of its divisors is an integer number (6092932140).

Almost surely, 2^12185864279 is an apocalyptic number.

12185864279 is a deficient number, since it is larger than the sum of its proper divisors (1).

12185864279 is an equidigital number, since it uses as much as digits as its factorization.

12185864279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1935360, while the sum is 53.

The spelling of 12185864279 in words is "twelve billion, one hundred eighty-five million, eight hundred sixty-four thousand, two hundred seventy-nine".