12638646205134 has 32 divisors (see below), whose sum is σ = 25522410994080. Its totient is φ = 4172222131200.

The previous prime is 12638646205117. The next prime is 12638646205169. The reversal of 12638646205134 is 43150264683621.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23883079 + ... + 24406530.

It is an arithmetic number, because the mean of its divisors is an integer number (797575343565).

Almost surely, 2^{12638646205134} is an apocalyptic number.

12638646205134 is an abundant number, since it is smaller than the sum of its proper divisors (12883764788946).

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

12638646205134 is a wasteful number, since it uses less digits than its factorization.

12638646205134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48290036.

The product of its (nonzero) digits is 4976640, while the sum is 51.

The spelling of 12638646205134 in words is "twelve trillion, six hundred thirty-eight billion, six hundred forty-six million, two hundred five thousand, one hundred thirty-four".