180478161 has 6 divisors (see below), whose sum is σ = 260690690. Its totient is φ = 120318768.

The previous prime is 180478157. The next prime is 180478163. The reversal of 180478161 is 161874081.

180478161 is a `hidden beast` number, since 180 + 478 + 1 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 145443600 + 35034561 = 12060^2 + 5919^2 .

It is not a de Polignac number, because 180478161 - 2² = 180478157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (180478163) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10026556 + ... + 10026573.

Almost surely, 2^180478161 is an apocalyptic number.

It is an amenable number.

180478161 is a deficient number, since it is larger than the sum of its proper divisors (80212529).

180478161 is a wasteful number, since it uses less digits than its factorization.

180478161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20053135 (or 20053132 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The square root of 180478161 is about 13434.2160545378. The cubic root of 180478161 is about 565.1211383037.

The spelling of 180478161 in words is "one hundred eighty million, four hundred seventy-eight thousand, one hundred sixty-one".