12638756265 has 32 divisors (see below), whose sum is σ = 20884663296. Its totient is φ = 6520001280.

The previous prime is 12638756261. The next prime is 12638756279. The reversal of 12638756265 is 56265783621.

12638756265 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 12638756265 - 2² = 12638756261 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12638756261) 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 31 ways as a sum of consecutive naturals, for example, 1146319 + ... + 1157291.

It is an arithmetic number, because the mean of its divisors is an integer number (652645728).

Almost surely, 2^12638756265 is an apocalyptic number.

12638756265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12638756265 is a deficient number, since it is larger than the sum of its proper divisors (8245907031).

12638756265 is a wasteful number, since it uses less digits than its factorization.

12638756265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13489.

The product of its digits is 3628800, while the sum is 51.

The spelling of 12638756265 in words is "twelve billion, six hundred thirty-eight million, seven hundred fifty-six thousand, two hundred sixty-five".