12638875125251 has 2 divisors, whose sum is σ = 12638875125252. Its totient is φ = 12638875125250.

The previous prime is 12638875125131. The next prime is 12638875125257. The reversal of 12638875125251 is 15252157883621.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12638875125251 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (12638875125257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6319437562625 + 6319437562626.

It is an arithmetic number, because the mean of its divisors is an integer number (6319437562626).

Almost surely, 2^{12638875125251} is an apocalyptic number.

12638875125251 is a deficient number, since it is larger than the sum of its proper divisors (1).

12638875125251 is an equidigital number, since it uses as much as digits as its factorization.

12638875125251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064000, while the sum is 56.

The spelling of 12638875125251 in words is "twelve trillion, six hundred thirty-eight billion, eight hundred seventy-five million, one hundred twenty-five thousand, two hundred fifty-one".