218213657316 has 96 divisors (see below), whose sum is σ = 584177484800. Its totient is φ = 70368756480.

The previous prime is 218213657297. The next prime is 218213657329. The reversal of 218213657316 is 613756312812.

It is a happy number.

218213657316 is a `hidden beast` number, since 2 + 18 + 21 + 36 + 573 + 16 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12609966 + ... + 12627258.

Almost surely, 2^218213657316 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 218213657316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292088742400).

218213657316 is an abundant number, since it is smaller than the sum of its proper divisors (365963827484).

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

218213657316 is a wasteful number, since it uses less digits than its factorization.

218213657316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21106 (or 21098 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The spelling of 218213657316 in words is "two hundred eighteen billion, two hundred thirteen million, six hundred fifty-seven thousand, three hundred sixteen".