12643605156 has 48 divisors (see below), whose sum is σ = 36309843584. Its totient is φ = 3334576896.

The previous prime is 12643605151. The next prime is 12643605181. The reversal of 12643605156 is 65150634621.

12643605156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (12643605151) 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 in 15 ways as a sum of consecutive naturals, for example, 5788105 + ... + 5790288.

Almost surely, 2^12643605156 is an apocalyptic number.

It is an amenable number.

12643605156 is an abundant number, since it is smaller than the sum of its proper divisors (23666238428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12643605156 is a wasteful number, since it uses less digits than its factorization.

12643605156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11578420 (or 11578418 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 12643605156 in words is "twelve billion, six hundred forty-three million, six hundred five thousand, one hundred fifty-six".