165344810901 has 16 divisors (see below), whose sum is σ = 226593969600. Its totient is φ = 107167390848.

The previous prime is 165344810893. The next prime is 165344810921. The reversal of 165344810901 is 109018443561.

It is not a de Polignac number, because 165344810901 - 2³ = 165344810893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165344810921) 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, 434731 + ... + 720888.

It is an arithmetic number, because the mean of its divisors is an integer number (14162123100).

Almost surely, 2^165344810901 is an apocalyptic number.

It is an amenable number.

165344810901 is a deficient number, since it is larger than the sum of its proper divisors (61249158699).

165344810901 is a wasteful number, since it uses less digits than its factorization.

165344810901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156948.

The product of its (nonzero) digits is 103680, while the sum is 42.

The spelling of 165344810901 in words is "one hundred sixty-five billion, three hundred forty-four million, eight hundred ten thousand, nine hundred one".