12643124717 has 2 divisors, whose sum is σ = 12643124718. Its totient is φ = 12643124716.

The previous prime is 12643124713. The next prime is 12643124729. The reversal of 12643124717 is 71742134621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6643228036 + 5999896681 = 81506^2 + 77459^2 .

It is a cyclic number.

It is not a de Polignac number, because 12643124717 - 2² = 12643124713 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12643124713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6321562358 + 6321562359.

It is an arithmetic number, because the mean of its divisors is an integer number (6321562359).

Almost surely, 2^12643124717 is an apocalyptic number.

It is an amenable number.

12643124717 is a deficient number, since it is larger than the sum of its proper divisors (1).

12643124717 is an equidigital number, since it uses as much as digits as its factorization.

12643124717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 38.

The spelling of 12643124717 in words is "twelve billion, six hundred forty-three million, one hundred twenty-four thousand, seven hundred seventeen".