242665718717 has 2 divisors, whose sum is σ = 242665718718. Its totient is φ = 242665718716.

The previous prime is 242665718707. The next prime is 242665718767. The reversal of 242665718717 is 717817566242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161776101796 + 80889616921 = 402214^2 + 284411^2 .

It is a cyclic number.

It is not a de Polignac number, because 242665718717 - 2²⁴ = 242648941501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242665718707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121332859358 + 121332859359.

It is an arithmetic number, because the mean of its divisors is an integer number (121332859359).

Almost surely, 2^242665718717 is an apocalyptic number.

It is an amenable number.

242665718717 is a deficient number, since it is larger than the sum of its proper divisors (1).

242665718717 is an equidigital number, since it uses as much as digits as its factorization.

242665718717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7902720, while the sum is 56.

The spelling of 242665718717 in words is "two hundred forty-two billion, six hundred sixty-five million, seven hundred eighteen thousand, seven hundred seventeen".