218888009904 has 40 divisors (see below), whose sum is σ = 565478025840. Its totient is φ = 72960433408.

The previous prime is 218888009869. The next prime is 218888009939. The reversal of 218888009904 is 409900888812.

It is an interprime number because it is at equal distance from previous prime (218888009869) and next prime (218888009939).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2445754 + ... + 2533670.

It is an arithmetic number, because the mean of its divisors is an integer number (14136950646).

Almost surely, 2^218888009904 is an apocalyptic number.

218888009904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

218888009904 is an abundant number, since it is smaller than the sum of its proper divisors (346590015936).

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

218888009904 is a wasteful number, since it uses less digits than its factorization.

218888009904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139797 (or 139791 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 57.

The spelling of 218888009904 in words is "two hundred eighteen billion, eight hundred eighty-eight million, nine thousand, nine hundred four".