218353518844 has 24 divisors (see below), whose sum is σ = 385813290240. Its totient is φ = 108121803696.

The previous prime is 218353518839. The next prime is 218353518853. The reversal of 218353518844 is 448815353812.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 218353518791 and 218353518800.

It is a congruent 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, 1283997 + ... + 1444075.

It is an arithmetic number, because the mean of its divisors is an integer number (16075553760).

Almost surely, 2^218353518844 is an apocalyptic number.

It is an amenable number.

218353518844 is a deficient number, since it is larger than the sum of its proper divisors (167459771396).

218353518844 is a wasteful number, since it uses less digits than its factorization.

218353518844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163377 (or 163375 counting only the distinct ones).

The product of its digits is 3686400, while the sum is 52.

The spelling of 218353518844 in words is "two hundred eighteen billion, three hundred fifty-three million, five hundred eighteen thousand, eight hundred forty-four".