165345215369 has 2 divisors, whose sum is σ = 165345215370. Its totient is φ = 165345215368.

The previous prime is 165345215341. The next prime is 165345215443. The reversal of 165345215369 is 963512543561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115977708025 + 49367507344 = 340555^2 + 222188^2 .

It is an emirp because it is prime and its reverse (963512543561) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165345215369 is a prime.

It is a super-2 number, since 2×165345215369² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (165345215069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82672607684 + 82672607685.

It is an arithmetic number, because the mean of its divisors is an integer number (82672607685).

Almost surely, 2^165345215369 is an apocalyptic number.

It is an amenable number.

165345215369 is a deficient number, since it is larger than the sum of its proper divisors (1).

165345215369 is an equidigital number, since it uses as much as digits as its factorization.

165345215369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916000, while the sum is 50.

The spelling of 165345215369 in words is "one hundred sixty-five billion, three hundred forty-five million, two hundred fifteen thousand, three hundred sixty-nine".