165319607569 has 2 divisors, whose sum is σ = 165319607570. Its totient is φ = 165319607568.

The previous prime is 165319607513. The next prime is 165319607581. The reversal of 165319607569 is 965706913561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164581941969 + 737665600 = 405687^2 + 27160^2 .

It is a cyclic number.

It is not a de Polignac number, because 165319607569 - 2⁷ = 165319607441 is a prime.

It is a super-2 number, since 2×165319607569² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (165319607669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82659803784 + 82659803785.

It is an arithmetic number, because the mean of its divisors is an integer number (82659803785).

Almost surely, 2^165319607569 is an apocalyptic number.

It is an amenable number.

165319607569 is a deficient number, since it is larger than the sum of its proper divisors (1).

165319607569 is an equidigital number, since it uses as much as digits as its factorization.

165319607569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9185400, while the sum is 58.

The spelling of 165319607569 in words is "one hundred sixty-five billion, three hundred nineteen million, six hundred seven thousand, five hundred sixty-nine".