12638858347799 has 2 divisors, whose sum is σ = 12638858347800. Its totient is φ = 12638858347798.

The previous prime is 12638858347781. The next prime is 12638858347909. The reversal of 12638858347799 is 99774385883621.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12638858347799 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12638858347769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6319429173899 + 6319429173900.

It is an arithmetic number, because the mean of its divisors is an integer number (6319429173900).

Almost surely, 2^{12638858347799} is an apocalyptic number.

12638858347799 is a deficient number, since it is larger than the sum of its proper divisors (1).

12638858347799 is an equidigital number, since it uses as much as digits as its factorization.

12638858347799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4389396480, while the sum is 80.

The spelling of 12638858347799 in words is "twelve trillion, six hundred thirty-eight billion, eight hundred fifty-eight million, three hundred forty-seven thousand, seven hundred ninety-nine".