161105161 has 16 divisors (see below), whose sum is σ = 195606400. Its totient is φ = 129610368.

The previous prime is 161105159. The next prime is 161105167. The reversal of 161105161 is 161501161.

It is a cyclic number.

It is not a de Polignac number, because 161105161 - 2¹ = 161105159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161105167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8941 + ... + 20053.

It is an arithmetic number, because the mean of its divisors is an integer number (12225400).

Almost surely, 2^161105161 is an apocalyptic number.

It is an amenable number.

161105161 is a deficient number, since it is larger than the sum of its proper divisors (34501239).

161105161 is a wasteful number, since it uses less digits than its factorization.

161105161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11248.

The product of its (nonzero) digits is 180, while the sum is 22.

The square root of 161105161 is about 12692.7207879162. The cubic root of 161105161 is about 544.1306016178.

The spelling of 161105161 in words is "one hundred sixty-one million, one hundred five thousand, one hundred sixty-one".