165005327171 has 2 divisors, whose sum is σ = 165005327172. Its totient is φ = 165005327170.

The previous prime is 165005327141. The next prime is 165005327177. The reversal of 165005327171 is 171723500561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165005327171 - 2¹⁰ = 165005326147 is a prime.

It is not a weakly prime, because it can be changed into another prime (165005327177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82502663585 + 82502663586.

It is an arithmetic number, because the mean of its divisors is an integer number (82502663586).

Almost surely, 2^165005327171 is an apocalyptic number.

165005327171 is a deficient number, since it is larger than the sum of its proper divisors (1).

165005327171 is an equidigital number, since it uses as much as digits as its factorization.

165005327171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44100, while the sum is 38.

The spelling of 165005327171 in words is "one hundred sixty-five billion, five million, three hundred twenty-seven thousand, one hundred seventy-one".