180918618 has 16 divisors (see below), whose sum is σ = 362321856. Its totient is φ = 60225440.

The previous prime is 180918599. The next prime is 180918623. The reversal of 180918618 is 816819081.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 180918618.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 15246 + ... + 24377.

It is an arithmetic number, because the mean of its divisors is an integer number (22645116).

Almost surely, 2^180918618 is an apocalyptic number.

180918618 is an abundant number, since it is smaller than the sum of its proper divisors (181403238).

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

180918618 is a wasteful number, since it uses less digits than its factorization.

180918618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40389.

The product of its (nonzero) digits is 27648, while the sum is 42.

The square root of 180918618 is about 13450.5991688103. The cubic root of 180918618 is about 565.5804909189.

The spelling of 180918618 in words is "one hundred eighty million, nine hundred eighteen thousand, six hundred eighteen".