218664224858 has 4 divisors (see below), whose sum is σ = 327996337290. Its totient is φ = 109332112428.

The previous prime is 218664224699. The next prime is 218664224879. The reversal of 218664224858 is 858422466812.

218664224858 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 can be written as a sum of positive squares in only one way, i.e., 138244906969 + 80419317889 = 371813^2 + 283583^2 .

It is a Curzon number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 54666056213 + ... + 54666056216.

Almost surely, 2^218664224858 is an apocalyptic number.

218664224858 is a deficient number, since it is larger than the sum of its proper divisors (109332112432).

218664224858 is a wasteful number, since it uses less digits than its factorization.

218664224858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109332112431.

The product of its digits is 11796480, while the sum is 56.

The spelling of 218664224858 in words is "two hundred eighteen billion, six hundred sixty-four million, two hundred twenty-four thousand, eight hundred fifty-eight".