165412434243361 has 2 divisors, whose sum is σ = 165412434243362. Its totient is φ = 165412434243360.

The previous prime is 165412434243349. The next prime is 165412434243389. The reversal of 165412434243361 is 163342434214561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134397069350625 + 31015364892736 = 11592975^2 + 5569144^2 .

It is a cyclic number.

It is not a de Polignac number, because 165412434243361 - 2⁷ = 165412434243233 is a prime.

It is a super-2 number, since 2×165412434243361² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (165412434243061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82706217121680 + 82706217121681.

It is an arithmetic number, because the mean of its divisors is an integer number (82706217121681).

Almost surely, 2^{165412434243361} is an apocalyptic number.

It is an amenable number.

165412434243361 is a deficient number, since it is larger than the sum of its proper divisors (1).

165412434243361 is an equidigital number, since it uses as much as digits as its factorization.

165412434243361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4976640, while the sum is 49.

The spelling of 165412434243361 in words is "one hundred sixty-five trillion, four hundred twelve billion, four hundred thirty-four million, two hundred forty-three thousand, three hundred sixty-one".