218112475555 has 16 divisors (see below), whose sum is σ = 281887329024. Its totient is φ = 161056874880.

The previous prime is 218112475549. The next prime is 218112475583. The reversal of 218112475555 is 555574211812.

It is a de Polignac number, because none of the positive numbers 2^k-218112475555 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 939502 + ... + 1148428.

It is an arithmetic number, because the mean of its divisors is an integer number (17617958064).

Almost surely, 2^218112475555 is an apocalyptic number.

218112475555 is a deficient number, since it is larger than the sum of its proper divisors (63774853469).

218112475555 is a wasteful number, since it uses less digits than its factorization.

218112475555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225006.

The product of its digits is 560000, while the sum is 46.

The spelling of 218112475555 in words is "two hundred eighteen billion, one hundred twelve million, four hundred seventy-five thousand, five hundred fifty-five".