216555218089 has 16 divisors (see below), whose sum is σ = 249269902336. Its totient is φ = 184288478400.

The previous prime is 216555218081. The next prime is 216555218093. The reversal of 216555218089 is 980812555612.

216555218089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 216555218089 - 2³ = 216555218081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216555218081) 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 15 ways as a sum of consecutive naturals, for example, 628279 + ... + 909859.

It is an arithmetic number, because the mean of its divisors is an integer number (15579368896).

Almost surely, 2^216555218089 is an apocalyptic number.

It is an amenable number.

216555218089 is a deficient number, since it is larger than the sum of its proper divisors (32714684247).

216555218089 is a wasteful number, since it uses less digits than its factorization.

216555218089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282376.

The product of its (nonzero) digits is 1728000, while the sum is 52.

The spelling of 216555218089 in words is "two hundred sixteen billion, five hundred fifty-five million, two hundred eighteen thousand, eighty-nine".