218714638656 has 28 divisors (see below), whose sum is σ = 578682481952. Its totient is φ = 72904879488.

The previous prime is 218714638627. The next prime is 218714638663. The reversal of 218714638656 is 656836417812.

It is a junction number, because it is equal to n+sod(n) for n = 218714638596 and 218714638605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 569569180 + ... + 569569563.

Almost surely, 2^218714638656 is an apocalyptic number.

It is an amenable number.

218714638656 is an abundant number, since it is smaller than the sum of its proper divisors (359967843296).

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

218714638656 is a wasteful number, since it uses less digits than its factorization.

218714638656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139138758 (or 1139138748 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 57.

The spelling of 218714638656 in words is "two hundred eighteen billion, seven hundred fourteen million, six hundred thirty-eight thousand, six hundred fifty-six".