218531940676 has 27 divisors (see below), whose sum is σ = 444881916927. Its totient is φ = 93653741160.

The previous prime is 218531940589. The next prime is 218531940677. The reversal of 218531940676 is 676049135812.

The square root of 218531940676 is 467474.

It is a perfect power (a square), and thus also a powerful number.

It is not an unprimeable number, because it can be changed into a prime (218531940677) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6527941 + ... + 6561331.

It is a 1-persistent number, because it is pandigital, but 2⋅218531940676 = 437063881352 is not.

Almost surely, 2^218531940676 is an apocalyptic number.

218531940676 is the 467474-th square number.

It is an amenable number.

218531940676 is an abundant number, since it is smaller than the sum of its proper divisors (226349976251).

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

218531940676 is an frugal number, since it uses more digits than its factorization.

218531940676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66800 (or 33400 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 218531940676 in words is "two hundred eighteen billion, five hundred thirty-one million, nine hundred forty thousand, six hundred seventy-six".