218474271680 has 56 divisors (see below), whose sum is σ = 594562131168. Its totient is φ = 74905463808.

The previous prime is 218474271679. The next prime is 218474271737. The reversal of 218474271680 is 86172474812.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×218474271680² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48764339 + ... + 48768818.

Almost surely, 2^218474271680 is an apocalyptic number.

218474271680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218474271680 is an abundant number, since it is smaller than the sum of its proper divisors (376087859488).

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

218474271680 is an equidigital number, since it uses as much as digits as its factorization.

218474271680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97533181 (or 97533171 counting only the distinct ones).

The product of its (nonzero) digits is 1204224, while the sum is 50.

The spelling of 218474271680 in words is "two hundred eighteen billion, four hundred seventy-four million, two hundred seventy-one thousand, six hundred eighty".