12638582766 has 40 divisors (see below), whose sum is σ = 29085200760. Its totient is φ = 4098997872.

The previous prime is 12638582743. The next prime is 12638582779. The reversal of 12638582766 is 66728583621.

12638582766 is a `hidden beast` number, since 1 + 26 + 38 + 582 + 7 + 6 + 6 = 666.

12638582766 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 19 ways as a sum of consecutive naturals, for example, 1048276 + ... + 1060263.

It is an arithmetic number, because the mean of its divisors is an integer number (727130019).

Almost surely, 2^12638582766 is an apocalyptic number.

12638582766 is an abundant number, since it is smaller than the sum of its proper divisors (16446617994).

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

12638582766 is a wasteful number, since it uses less digits than its factorization.

12638582766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2108590 (or 2108581 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The spelling of 12638582766 in words is "twelve billion, six hundred thirty-eight million, five hundred eighty-two thousand, seven hundred sixty-six".