12566789156 has 24 divisors (see below), whose sum is σ = 22222594296. Its totient is φ = 6217767680.

The previous prime is 12566789149. The next prime is 12566789167. The reversal of 12566789156 is 65198766521.

12566789156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1765344256 + 10801444900 = 42016^2 + 103930^2 .

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 137546 + ... + 209886.

It is an arithmetic number, because the mean of its divisors is an integer number (925941429).

Almost surely, 2^12566789156 is an apocalyptic number.

It is an amenable number.

12566789156 is a deficient number, since it is larger than the sum of its proper divisors (9655805140).

12566789156 is a wasteful number, since it uses less digits than its factorization.

12566789156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72799 (or 72797 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 56.

The spelling of 12566789156 in words is "twelve billion, five hundred sixty-six million, seven hundred eighty-nine thousand, one hundred fifty-six".