12638901275265 has 32 divisors (see below), whose sum is σ = 20444518535040. Its totient is φ = 6667058958336.

The previous prime is 12638901275261. The next prime is 12638901275279. The reversal of 12638901275265 is 56257210983621.

12638901275265 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12638901275265 - 2² = 12638901275261 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12638901275261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12116995 + ... + 13118664.

It is an arithmetic number, because the mean of its divisors is an integer number (638891204220).

Almost surely, 2^{12638901275265} is an apocalyptic number.

12638901275265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12638901275265 is a deficient number, since it is larger than the sum of its proper divisors (7805617259775).

12638901275265 is a wasteful number, since it uses less digits than its factorization.

12638901275265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25236033.

The product of its (nonzero) digits is 10886400, while the sum is 57.

The spelling of 12638901275265 in words is "twelve trillion, six hundred thirty-eight billion, nine hundred one million, two hundred seventy-five thousand, two hundred sixty-five".