218254720004165 has 64 divisors (see below), whose sum is σ = 312245098905600. Its totient is φ = 144901236420864.

The previous prime is 218254720004117. The next prime is 218254720004179. The reversal of 218254720004165 is 561400027452812.

It is not a de Polignac number, because 218254720004165 - 2³⁴ = 218237540134981 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26643245 + ... + 33858114.

It is an arithmetic number, because the mean of its divisors is an integer number (4878829670400).

Almost surely, 2^{218254720004165} is an apocalyptic number.

It is an amenable number.

218254720004165 is a deficient number, since it is larger than the sum of its proper divisors (93990378901435).

218254720004165 is a wasteful number, since it uses less digits than its factorization.

218254720004165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60501546.

The product of its (nonzero) digits is 1075200, while the sum is 47.

Adding to 218254720004165 its reverse (561400027452812), we get a palindrome (779654747456977).

The spelling of 218254720004165 in words is "two hundred eighteen trillion, two hundred fifty-four billion, seven hundred twenty million, four thousand, one hundred sixty-five".