171795665159 has 2 divisors, whose sum is σ = 171795665160. Its totient is φ = 171795665158.

The previous prime is 171795665081. The next prime is 171795665177. The reversal of 171795665159 is 951566597171.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-171795665159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171795665059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85897832579 + 85897832580.

It is an arithmetic number, because the mean of its divisors is an integer number (85897832580).

Almost surely, 2^171795665159 is an apocalyptic number.

171795665159 is a deficient number, since it is larger than the sum of its proper divisors (1).

171795665159 is an equidigital number, since it uses as much as digits as its factorization.

171795665159 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17860500, while the sum is 62.

The spelling of 171795665159 in words is "one hundred seventy-one billion, seven hundred ninety-five million, six hundred sixty-five thousand, one hundred fifty-nine".