165445338241 has 2 divisors, whose sum is σ = 165445338242. Its totient is φ = 165445338240.

The previous prime is 165445338229. The next prime is 165445338263. The reversal of 165445338241 is 142833544561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154288697616 + 11156640625 = 392796^2 + 105625^2 .

It is an emirp because it is prime and its reverse (142833544561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165445338241 - 2²⁹ = 164908467329 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165445338191 and 165445338200.

It is not a weakly prime, because it can be changed into another prime (165445338211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82722669120 + 82722669121.

It is an arithmetic number, because the mean of its divisors is an integer number (82722669121).

Almost surely, 2^165445338241 is an apocalyptic number.

It is an amenable number.

165445338241 is a deficient number, since it is larger than the sum of its proper divisors (1).

165445338241 is an equidigital number, since it uses as much as digits as its factorization.

165445338241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1382400, while the sum is 46.

The spelling of 165445338241 in words is "one hundred sixty-five billion, four hundred forty-five million, three hundred thirty-eight thousand, two hundred forty-one".