165441034515323 has 16 divisors (see below), whose sum is σ = 193480180861440. Its totient is φ = 138503325776256.

The previous prime is 165441034515293. The next prime is 165441034515373. The reversal of 165441034515323 is 323515430144561.

It is a happy number.

It is not a de Polignac number, because 165441034515323 - 2²⁰ = 165441033466747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165441034515373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3132863 + ... + 18457976.

It is an arithmetic number, because the mean of its divisors is an integer number (12092511303840).

Almost surely, 2^{165441034515323} is an apocalyptic number.

165441034515323 is a deficient number, since it is larger than the sum of its proper divisors (28039146346117).

165441034515323 is a wasteful number, since it uses less digits than its factorization.

165441034515323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21616346.

The product of its (nonzero) digits is 2592000, while the sum is 47.

Adding to 165441034515323 its reverse (323515430144561), we get a palindrome (488956464659884).

The spelling of 165441034515323 in words is "one hundred sixty-five trillion, four hundred forty-one billion, thirty-four million, five hundred fifteen thousand, three hundred twenty-three".