165404435323 has 2 divisors, whose sum is σ = 165404435324. Its totient is φ = 165404435322.

The previous prime is 165404435311. The next prime is 165404435327. The reversal of 165404435323 is 323534404561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165404435323 - 2³⁷ = 27965481851 is a prime.

It is a super-2 number, since 2×165404435323² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (165404435327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82702217661 + 82702217662.

It is an arithmetic number, because the mean of its divisors is an integer number (82702217662).

Almost surely, 2^165404435323 is an apocalyptic number.

165404435323 is a deficient number, since it is larger than the sum of its proper divisors (1).

165404435323 is an equidigital number, since it uses as much as digits as its factorization.

165404435323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518400, while the sum is 40.

Adding to 165404435323 its reverse (323534404561), we get a palindrome (488938839884).

The spelling of 165404435323 in words is "one hundred sixty-five billion, four hundred four million, four hundred thirty-five thousand, three hundred twenty-three".