218494888080 has 80 divisors (see below), whose sum is σ = 774096180864. Its totient is φ = 49941688320.

The previous prime is 218494888067. The next prime is 218494888099. The reversal of 218494888080 is 80888494812.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×218494888080² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65026561 + ... + 65029920.

Almost surely, 2^218494888080 is an apocalyptic number.

218494888080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218494888080 is an abundant number, since it is smaller than the sum of its proper divisors (555601292784).

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

218494888080 is a wasteful number, since it uses less digits than its factorization.

218494888080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130056504 (or 130056498 counting only the distinct ones).

The product of its (nonzero) digits is 9437184, while the sum is 60.

The spelling of 218494888080 in words is "two hundred eighteen billion, four hundred ninety-four million, eight hundred eighty-eight thousand, eighty".