218710372818808 has 128 divisors (see below), whose sum is σ = 479114092800000. Its totient is φ = 92756476657152.

The previous prime is 218710372818733. The next prime is 218710372818827. The reversal of 218710372818808 is 808818273017812.

It is a self number, because there is not a number n which added to its sum of digits gives 218710372818808.

It is a congruent number.

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, 5882373 + ... + 21726091.

It is an arithmetic number, because the mean of its divisors is an integer number (3743078850000).

Almost surely, 2^{218710372818808} 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 218710372818808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239557046400000).

218710372818808 is an abundant number, since it is smaller than the sum of its proper divisors (260403719981192).

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

218710372818808 is a wasteful number, since it uses less digits than its factorization.

218710372818808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15843989 (or 15843985 counting only the distinct ones).

The product of its (nonzero) digits is 19267584, while the sum is 64.

The spelling of 218710372818808 in words is "two hundred eighteen trillion, seven hundred ten billion, three hundred seventy-two million, eight hundred eighteen thousand, eight hundred eight".