218236397265 has 12 divisors (see below), whose sum is σ = 378276422004. Its totient is φ = 116392745184.

The previous prime is 218236397213. The next prime is 218236397303. The reversal of 218236397265 is 562793632812.

218236397265 is a `hidden beast` number, since 2 + 18 + 2 + 363 + 9 + 7 + 265 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 54184666176 + 164051731089 = 232776^2 + 405033^2 .

It is not a de Polignac number, because 218236397265 - 2⁸ = 218236397009 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2424848814 + ... + 2424848903.

It is an arithmetic number, because the mean of its divisors is an integer number (31523035167).

Almost surely, 2^218236397265 is an apocalyptic number.

It is an amenable number.

218236397265 is a deficient number, since it is larger than the sum of its proper divisors (160040024739).

218236397265 is a wasteful number, since it uses less digits than its factorization.

218236397265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4849697728 (or 4849697725 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 54.

The spelling of 218236397265 in words is "two hundred eighteen billion, two hundred thirty-six million, three hundred ninety-seven thousand, two hundred sixty-five".