161104161 has 12 divisors (see below), whose sum is σ = 218522192. Its totient is φ = 105575544.

The previous prime is 161104133. The next prime is 161104271. The reversal of 161104161 is 161401161.

It is not a de Polignac number, because 161104161 - 2⁷ = 161104033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161104561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2730 + ... + 18156.

Almost surely, 2^161104161 is an apocalyptic number.

It is an amenable number.

161104161 is a deficient number, since it is larger than the sum of its proper divisors (57418031).

161104161 is an equidigital number, since it uses as much as digits as its factorization.

161104161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15548 (or 15489 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 161104161 is about 12692.6813951978. The cubic root of 161104161 is about 544.1294757864.

The spelling of 161104161 in words is "one hundred sixty-one million, one hundred four thousand, one hundred sixty-one".