218808005612 has 24 divisors (see below), whose sum is σ = 438028526880. Its totient is φ = 93686463360.

The previous prime is 218808005587. The next prime is 218808005641. The reversal of 218808005612 is 216500808812.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 218808005612.

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, 3652937 + ... + 3712352.

It is an arithmetic number, because the mean of its divisors is an integer number (18251188620).

Almost surely, 2^218808005612 is an apocalyptic number.

It is an amenable number.

218808005612 is an abundant number, since it is smaller than the sum of its proper divisors (219220521268).

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

218808005612 is a wasteful number, since it uses less digits than its factorization.

218808005612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7366361 (or 7366359 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 41.

The spelling of 218808005612 in words is "two hundred eighteen billion, eight hundred eight million, five thousand, six hundred twelve".