12638712402 has 24 divisors (see below), whose sum is σ = 27388108800. Its totient is φ = 4212253080.

The previous prime is 12638712397. The next prime is 12638712403. The reversal of 12638712402 is 20421783621.

It is a happy number.

12638712402 is a `hidden beast` number, since 1 + 2 + 638 + 7 + 12 + 4 + 0 + 2 = 666.

12638712402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (12638712403) 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 11 ways as a sum of consecutive naturals, for example, 73599 + ... + 175197.

It is an arithmetic number, because the mean of its divisors is an integer number (1141171200).

Almost surely, 2^12638712402 is an apocalyptic number.

12638712402 is an abundant number, since it is smaller than the sum of its proper divisors (14749396398).

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

12638712402 is a wasteful number, since it uses less digits than its factorization.

12638712402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108518 (or 108515 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The spelling of 12638712402 in words is "twelve billion, six hundred thirty-eight million, seven hundred twelve thousand, four hundred two".