218855319894 has 24 divisors (see below), whose sum is σ = 474204695952. Its totient is φ = 72948978000.

The previous prime is 218855319863. The next prime is 218855319941. The reversal of 218855319894 is 498913558812.

218855319894 is a `hidden beast` number, since 2 + 1 + 8 + 8 + 5 + 531 + 9 + 8 + 94 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 280452 + ... + 718584.

It is an arithmetic number, because the mean of its divisors is an integer number (19758528998).

Almost surely, 2^218855319894 is an apocalyptic number.

218855319894 is an abundant number, since it is smaller than the sum of its proper divisors (255349376058).

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

218855319894 is a wasteful number, since it uses less digits than its factorization.

218855319894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465892 (or 465889 counting only the distinct ones).

The product of its digits is 24883200, while the sum is 63.

The spelling of 218855319894 in words is "two hundred eighteen billion, eight hundred fifty-five million, three hundred nineteen thousand, eight hundred ninety-four".