12688443692317 has 2 divisors, whose sum is σ = 12688443692318. Its totient is φ = 12688443692316.

The previous prime is 12688443692209. The next prime is 12688443692329. The reversal of 12688443692317 is 71329634488621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11630684923641 + 1057758768676 = 3410379^2 + 1028474^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12688443692317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12688443692387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6344221846158 + 6344221846159.

It is an arithmetic number, because the mean of its divisors is an integer number (6344221846159).

Almost surely, 2^{12688443692317} is an apocalyptic number.

It is an amenable number.

12688443692317 is a deficient number, since it is larger than the sum of its proper divisors (1).

12688443692317 is an equidigital number, since it uses as much as digits as its factorization.

12688443692317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 83607552, while the sum is 64.

The spelling of 12688443692317 in words is "twelve trillion, six hundred eighty-eight billion, four hundred forty-three million, six hundred ninety-two thousand, three hundred seventeen".