218564373136 has 20 divisors (see below), whose sum is σ = 441880146432. Its totient is φ = 104530786976.

The previous prime is 218564373091. The next prime is 218564373169. The reversal of 218564373136 is 631373465812.

218564373136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 218564373136.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296962096 + ... + 296962831.

Almost surely, 2^218564373136 is an apocalyptic number.

It is an amenable number.

218564373136 is an abundant number, since it is smaller than the sum of its proper divisors (223315773296).

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

218564373136 is a wasteful number, since it uses less digits than its factorization.

218564373136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593924958 (or 593924952 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 49.

The spelling of 218564373136 in words is "two hundred eighteen billion, five hundred sixty-four million, three hundred seventy-three thousand, one hundred thirty-six".