12638858347987 has 2 divisors, whose sum is σ = 12638858347988. Its totient is φ = 12638858347986.

The previous prime is 12638858347909. The next prime is 12638858347991. The reversal of 12638858347987 is 78974385883621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12638858347987 - 2¹⁵ = 12638858315219 is a prime.

It is not a weakly prime, because it can be changed into another prime (12638858047987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6319429173993 + 6319429173994.

It is an arithmetic number, because the mean of its divisors is an integer number (6319429173994).

Almost surely, 2^{12638858347987} is an apocalyptic number.

12638858347987 is a deficient number, since it is larger than the sum of its proper divisors (1).

12638858347987 is an equidigital number, since it uses as much as digits as its factorization.

12638858347987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3901685760, while the sum is 79.

The spelling of 12638858347987 in words is "twelve trillion, six hundred thirty-eight billion, eight hundred fifty-eight million, three hundred forty-seven thousand, nine hundred eighty-seven".