218667664900 has 36 divisors (see below), whose sum is σ = 475801852288. Its totient is φ = 87228721440.

The previous prime is 218667664867. The next prime is 218667664909. The reversal of 218667664900 is 9466766812.

It is not an unprimeable number, because it can be changed into a prime (218667664909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2942424 + ... + 3015823.

Almost surely, 2^218667664900 is an apocalyptic number.

218667664900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218667664900 is an abundant number, since it is smaller than the sum of its proper divisors (257134187388).

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

218667664900 is a wasteful number, since it uses less digits than its factorization.

218667664900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5958628 (or 5958621 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 55.

The spelling of 218667664900 in words is "two hundred eighteen billion, six hundred sixty-seven million, six hundred sixty-four thousand, nine hundred".