12657586717 has 2 divisors, whose sum is σ = 12657586718. Its totient is φ = 12657586716.

The previous prime is 12657586663. The next prime is 12657586751. The reversal of 12657586717 is 71768575621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9921355236 + 2736231481 = 99606^2 + 52309^2 .

It is a cyclic number.

It is not a de Polignac number, because 12657586717 - 2¹¹ = 12657584669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12657580717) 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, 6328793358 + 6328793359.

It is an arithmetic number, because the mean of its divisors is an integer number (6328793359).

Almost surely, 2^12657586717 is an apocalyptic number.

It is an amenable number.

12657586717 is a deficient number, since it is larger than the sum of its proper divisors (1).

12657586717 is an equidigital number, since it uses as much as digits as its factorization.

12657586717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4939200, while the sum is 55.

The spelling of 12657586717 in words is "twelve billion, six hundred fifty-seven million, five hundred eighty-six thousand, seven hundred seventeen".