164717261717 has 2 divisors, whose sum is σ = 164717261718. Its totient is φ = 164717261716.

The previous prime is 164717261689. The next prime is 164717261729. The reversal of 164717261717 is 717162717461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112526031601 + 52191230116 = 335449^2 + 228454^2 .

It is a cyclic number.

It is not a de Polignac number, because 164717261717 - 2²⁰ = 164716213141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164717261017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82358630858 + 82358630859.

It is an arithmetic number, because the mean of its divisors is an integer number (82358630859).

Almost surely, 2^164717261717 is an apocalyptic number.

It is an amenable number.

164717261717 is a deficient number, since it is larger than the sum of its proper divisors (1).

164717261717 is an equidigital number, since it uses as much as digits as its factorization.

164717261717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 691488, while the sum is 50.

The spelling of 164717261717 in words is "one hundred sixty-four billion, seven hundred seventeen million, two hundred sixty-one thousand, seven hundred seventeen".