218647855850 has 24 divisors (see below), whose sum is σ = 407984354220. Its totient is φ = 87179713920.

The previous prime is 218647855849. The next prime is 218647855859. The reversal of 218647855850 is 58558746812.

218647855850 is digitally balanced in base 2, 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 6 ways, for example, as 15864289 + 218631991561 = 3983^2 + 467581^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 218647855850.

It is not an unprimeable number, because it can be changed into a prime (218647855859) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 6969905 + ... + 7001204.

Almost surely, 2^218647855850 is an apocalyptic number.

218647855850 is a deficient number, since it is larger than the sum of its proper divisors (189336498370).

218647855850 is a wasteful number, since it uses less digits than its factorization.

218647855850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13971434 (or 13971429 counting only the distinct ones).

The product of its (nonzero) digits is 21504000, while the sum is 59.

The spelling of 218647855850 in words is "two hundred eighteen billion, six hundred forty-seven million, eight hundred fifty-five thousand, eight hundred fifty".