180861164 has 24 divisors (see below), whose sum is σ = 365592528. Its totient is φ = 77373440.

The previous prime is 180861151. The next prime is 180861199. The reversal of 180861164 is 461168081.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120149 + ... + 121644.

It is an arithmetic number, because the mean of its divisors is an integer number (15233022).

Almost surely, 2^180861164 is an apocalyptic number.

It is an amenable number.

180861164 is an abundant number, since it is smaller than the sum of its proper divisors (184731364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

180861164 is a wasteful number, since it uses less digits than its factorization.

180861164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241825 (or 241823 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 180861164 is about 13448.4632579340. The cubic root of 180861164 is about 565.5206144539.

The spelling of 180861164 in words is "one hundred eighty million, eight hundred sixty-one thousand, one hundred sixty-four".