12726862717 has 2 divisors, whose sum is σ = 12726862718. Its totient is φ = 12726862716.

The previous prime is 12726862679. The next prime is 12726862723. The reversal of 12726862717 is 71726862721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12711660516 + 15202201 = 112746^2 + 3899^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12726862717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12726862817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6363431358 + 6363431359.

It is an arithmetic number, because the mean of its divisors is an integer number (6363431359).

Almost surely, 2^12726862717 is an apocalyptic number.

It is an amenable number.

12726862717 is a deficient number, since it is larger than the sum of its proper divisors (1).

12726862717 is an equidigital number, since it uses as much as digits as its factorization.

12726862717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 790272, while the sum is 49.

The spelling of 12726862717 in words is "twelve billion, seven hundred twenty-six million, eight hundred sixty-two thousand, seven hundred seventeen".