218886738660 has 72 divisors (see below), whose sum is σ = 664014589056. Its totient is φ = 58364685120.

The previous prime is 218886738659. The next prime is 218886738661. The reversal of 218886738660 is 66837688812.

It is an interprime number because it is at equal distance from previous prime (218886738659) and next prime (218886738661).

It is a super-2 number, since 2×218886738660² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (218886738661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2294515 + ... + 2388005.

It is an arithmetic number, because the mean of its divisors is an integer number (9222424848).

Almost surely, 2^218886738660 is an apocalyptic number.

218886738660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218886738660 is an abundant number, since it is smaller than the sum of its proper divisors (445127850396).

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

218886738660 is a wasteful number, since it uses less digits than its factorization.

218886738660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106513 (or 106508 counting only the distinct ones).

The product of its (nonzero) digits is 37158912, while the sum is 63.

The spelling of 218886738660 in words is "two hundred eighteen billion, eight hundred eighty-six million, seven hundred thirty-eight thousand, six hundred sixty".