161175161 has 12 divisors (see below), whose sum is σ = 187785360. Its totient is φ = 137932200.

The previous prime is 161175151. The next prime is 161175193. The reversal of 161175161 is 161571161.

It is a de Polignac number, because none of the positive numbers 2^k-161175161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161175151) 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, 33986 + ... + 38436.

It is an arithmetic number, because the mean of its divisors is an integer number (15648780).

Almost surely, 2^161175161 is an apocalyptic number.

It is an amenable number.

161175161 is a deficient number, since it is larger than the sum of its proper divisors (26610199).

161175161 is an equidigital number, since it uses as much as digits as its factorization.

161175161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5204 (or 5197 counting only the distinct ones).

The product of its digits is 1260, while the sum is 29.

The square root of 161175161 is about 12695.4779744600. The cubic root of 161175161 is about 544.2093982387.

The spelling of 161175161 in words is "one hundred sixty-one million, one hundred seventy-five thousand, one hundred sixty-one".