12636140646 has 16 divisors (see below), whose sum is σ = 26602401600. Its totient is φ = 3990360168.

The previous prime is 12636140617. The next prime is 12636140669. The reversal of 12636140646 is 64604163621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55421556 + ... + 55421783.

It is an arithmetic number, because the mean of its divisors is an integer number (1662650100).

Almost surely, 2^12636140646 is an apocalyptic number.

12636140646 is an abundant number, since it is smaller than the sum of its proper divisors (13966260954).

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

12636140646 is a wasteful number, since it uses less digits than its factorization.

12636140646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110843363.

The product of its (nonzero) digits is 124416, while the sum is 39.

The spelling of 12636140646 in words is "twelve billion, six hundred thirty-six million, one hundred forty thousand, six hundred forty-six".