218974497218 has 8 divisors (see below), whose sum is σ = 328480674060. Its totient is φ = 109480939200.

The previous prime is 218974497179. The next prime is 218974497221. The reversal of 218974497218 is 812794479812.

218974497218 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 195552337369 + 23422159849 = 442213^2 + 153043^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3111203 + ... + 3180806.

Almost surely, 2^218974497218 is an apocalyptic number.

218974497218 is a deficient number, since it is larger than the sum of its proper divisors (109506176842).

218974497218 is a wasteful number, since it uses less digits than its factorization.

218974497218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6309412.

The product of its digits is 16257024, while the sum is 62.

The spelling of 218974497218 in words is "two hundred eighteen billion, nine hundred seventy-four million, four hundred ninety-seven thousand, two hundred eighteen".