218635678904 has 16 divisors (see below), whose sum is σ = 409950427320. Its totient is φ = 109315564960.

The previous prime is 218635678901. The next prime is 218635678931. The reversal of 218635678904 is 409876536812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218635678901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166214 + ... + 681834.

It is a 1-persistent number, because it is pandigital, but 2⋅218635678904 = 437271357808 is not.

Almost surely, 2^218635678904 is an apocalyptic number.

It is an amenable number.

218635678904 is a deficient number, since it is larger than the sum of its proper divisors (191314748416).

218635678904 is a wasteful number, since it uses less digits than its factorization.

218635678904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568630 (or 568626 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 59.

The spelling of 218635678904 in words is "two hundred eighteen billion, six hundred thirty-five million, six hundred seventy-eight thousand, nine hundred four".