165309324329 has 2 divisors, whose sum is σ = 165309324330. Its totient is φ = 165309324328.

The previous prime is 165309324203. The next prime is 165309324331. The reversal of 165309324329 is 923423903561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137605386304 + 27703938025 = 370952^2 + 166445^2 .

It is a cyclic number.

It is not a de Polignac number, because 165309324329 - 2¹² = 165309320233 is a prime.

It is a super-2 number, since 2×165309324329² (a number of 23 digits) contains 22 as substring.

Together with 165309324331, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (165309320329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82654662164 + 82654662165.

It is an arithmetic number, because the mean of its divisors is an integer number (82654662165).

Almost surely, 2^165309324329 is an apocalyptic number.

It is an amenable number.

165309324329 is a deficient number, since it is larger than the sum of its proper divisors (1).

165309324329 is an equidigital number, since it uses as much as digits as its factorization.

165309324329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1049760, while the sum is 47.

The spelling of 165309324329 in words is "one hundred sixty-five billion, three hundred nine million, three hundred twenty-four thousand, three hundred twenty-nine".