185118161 has 4 divisors (see below), whose sum is σ = 185342832. Its totient is φ = 184893492.

The previous prime is 185118149. The next prime is 185118163. The reversal of 185118161 is 161811581.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 185118161 - 2¹⁰ = 185117137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (185118163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111095 + ... + 112748.

It is an arithmetic number, because the mean of its divisors is an integer number (46335708).

Almost surely, 2^185118161 is an apocalyptic number.

It is an amenable number.

185118161 is a deficient number, since it is larger than the sum of its proper divisors (224671).

185118161 is an equidigital number, since it uses as much as digits as its factorization.

185118161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224670.

The product of its digits is 1920, while the sum is 32.

The square root of 185118161 is about 13605.8135001182. The cubic root of 185118161 is about 569.9232080810.

The spelling of 185118161 in words is "one hundred eighty-five million, one hundred eighteen thousand, one hundred sixty-one".