218389810799 has 4 divisors (see below), whose sum is σ = 225920493960. Its totient is φ = 210859127640.

The previous prime is 218389810781. The next prime is 218389810801. The reversal of 218389810799 is 997018983812.

218389810799 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 218389810799 - 2²⁸ = 218121375343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218389810399) 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 3 ways as a sum of consecutive naturals, for example, 3765341537 + ... + 3765341594.

It is an arithmetic number, because the mean of its divisors is an integer number (56480123490).

Almost surely, 2^218389810799 is an apocalyptic number.

218389810799 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

218389810799 is a deficient number, since it is larger than the sum of its proper divisors (7530683161).

218389810799 is an equidigital number, since it uses as much as digits as its factorization.

218389810799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7530683160.

The product of its (nonzero) digits is 15676416, while the sum is 65.

The spelling of 218389810799 in words is "two hundred eighteen billion, three hundred eighty-nine million, eight hundred ten thousand, seven hundred ninety-nine".