12638765376 has 84 divisors (see below), whose sum is σ = 36250300372. Its totient is φ = 4210182144.

The previous prime is 12638765369. The next prime is 12638765431. The reversal of 12638765376 is 67356783621.

12638765376 is a `hidden beast` number, since 1 + 2 + 6 + 38 + 76 + 537 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5802782976 + 6835982400 = 76176^2 + 82680^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1003470 + ... + 1015986.

Almost surely, 2^12638765376 is an apocalyptic number.

12638765376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12638765376 is an abundant number, since it is smaller than the sum of its proper divisors (23611534996).

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

12638765376 is a wasteful number, since it uses less digits than its factorization.

12638765376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14288 (or 14275 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 54.

The spelling of 12638765376 in words is "twelve billion, six hundred thirty-eight million, seven hundred sixty-five thousand, three hundred seventy-six".