218214464685 has 64 divisors (see below), whose sum is σ = 400126003200. Its totient is φ = 99479284992.

The previous prime is 218214464681. The next prime is 218214464719. The reversal of 218214464685 is 586464412812.

It is not a de Polignac number, because 218214464685 - 2² = 218214464681 is a prime.

It is a super-2 number, since 2×218214464685² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218214464681) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 110264026 + ... + 110266004.

It is an arithmetic number, because the mean of its divisors is an integer number (6251968800).

Almost surely, 2^218214464685 is an apocalyptic number.

It is an amenable number.

218214464685 is a deficient number, since it is larger than the sum of its proper divisors (181911538515).

218214464685 is a wasteful number, since it uses less digits than its factorization.

218214464685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4370.

The product of its digits is 2949120, while the sum is 51.

The spelling of 218214464685 in words is "two hundred eighteen billion, two hundred fourteen million, four hundred sixty-four thousand, six hundred eighty-five".