12638737446 has 16 divisors (see below), whose sum is σ = 25461983664. Its totient is φ = 4182161024.

The previous prime is 12638737411. The next prime is 12638737453. The reversal of 12638737446 is 64473783621.

12638737446 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 7686975 + ... + 7688618.

It is an arithmetic number, because the mean of its divisors is an integer number (1591373979).

Almost surely, 2^12638737446 is an apocalyptic number.

12638737446 is an abundant number, since it is smaller than the sum of its proper divisors (12823246218).

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

12638737446 is a wasteful number, since it uses less digits than its factorization.

12638737446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15375735.

The product of its digits is 4064256, while the sum is 51.

The spelling of 12638737446 in words is "twelve billion, six hundred thirty-eight million, seven hundred thirty-seven thousand, four hundred forty-six".