218664063655513 has 12 divisors (see below), whose sum is σ = 254783370577152. Its totient is φ = 187117565390280.

The previous prime is 218664063655483. The next prime is 218664063655561. The reversal of 218664063655513 is 315556360466812.

It is not a de Polignac number, because 218664063655513 - 2⁵ = 218664063655481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218664063655013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3675861453 + ... + 3675920938.

It is an arithmetic number, because the mean of its divisors is an integer number (21231947548096).

Almost surely, 2^{218664063655513} is an apocalyptic number.

It is an amenable number.

218664063655513 is a deficient number, since it is larger than the sum of its proper divisors (36119306921639).

218664063655513 is an equidigital number, since it uses as much as digits as its factorization.

218664063655513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7351783012 (or 7351783005 counting only the distinct ones).

The product of its (nonzero) digits is 93312000, while the sum is 61.

The spelling of 218664063655513 in words is "two hundred eighteen trillion, six hundred sixty-four billion, sixty-three million, six hundred fifty-five thousand, five hundred thirteen".