12638777651275 has 6 divisors (see below), whose sum is σ = 15672084287612. Its totient is φ = 10111022121000.

The previous prime is 12638777651243. The next prime is 12638777651309. The reversal of 12638777651275 is 57215677783621.

It is not a de Polignac number, because 12638777651275 - 2⁵ = 12638777651243 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12638777651275.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 252775553001 + ... + 252775553050.

Almost surely, 2^{12638777651275} is an apocalyptic number.

12638777651275 is a deficient number, since it is larger than the sum of its proper divisors (3033306636337).

12638777651275 is an equidigital number, since it uses as much as digits as its factorization.

12638777651275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505551106061 (or 505551106056 counting only the distinct ones).

The product of its digits is 207446400, while the sum is 67.

The spelling of 12638777651275 in words is "twelve trillion, six hundred thirty-eight billion, seven hundred seventy-seven million, six hundred fifty-one thousand, two hundred seventy-five".