218576645680 has 20 divisors (see below), whose sum is σ = 508190701392. Its totient is φ = 87430658240.

The previous prime is 218576645671. The next prime is 218576645713. The reversal of 218576645680 is 86546675812.

It is a happy number.

218576645680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1366103956 + ... + 1366104115.

Almost surely, 2^218576645680 is an apocalyptic number.

218576645680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218576645680 is an abundant number, since it is smaller than the sum of its proper divisors (289614055712).

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

218576645680 is a wasteful number, since it uses less digits than its factorization.

218576645680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2732208084 (or 2732208078 counting only the distinct ones).

The product of its (nonzero) digits is 19353600, while the sum is 58.

The spelling of 218576645680 in words is "two hundred eighteen billion, five hundred seventy-six million, six hundred forty-five thousand, six hundred eighty".