12638776375 has 16 divisors (see below), whose sum is σ = 16317100800. Its totient is φ = 9762362400.

The previous prime is 12638776363. The next prime is 12638776417. The reversal of 12638776375 is 57367783621.

It is a happy number.

It is not a de Polignac number, because 12638776375 - 2⁵ = 12638776343 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1739655 + ... + 1746904.

It is an arithmetic number, because the mean of its divisors is an integer number (1019818800).

Almost surely, 2^12638776375 is an apocalyptic number.

12638776375 is a deficient number, since it is larger than the sum of its proper divisors (3678324425).

12638776375 is an equidigital number, since it uses as much as digits as its factorization.

12638776375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3486603 (or 3486593 counting only the distinct ones).

The product of its digits is 8890560, while the sum is 55.

The spelling of 12638776375 in words is "twelve billion, six hundred thirty-eight million, seven hundred seventy-six thousand, three hundred seventy-five".