218286439982464 has 64 divisors (see below), whose sum is σ = 501636228284160. Its totient is φ = 92677019871744.

The previous prime is 218286439982459. The next prime is 218286439982467. The reversal of 218286439982464 is 464289934682812.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×218286439982464² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218286439982467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1138330572 + ... + 1138522315.

It is an arithmetic number, because the mean of its divisors is an integer number (7838066066940).

Almost surely, 2^{218286439982464} is an apocalyptic number.

It is an amenable number.

218286439982464 is an abundant number, since it is smaller than the sum of its proper divisors (283349788301696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218286439982464 is a wasteful number, since it uses less digits than its factorization.

218286439982464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2276853015 (or 2276853003 counting only the distinct ones).

The product of its digits is 2293235712, while the sum is 76.

The spelling of 218286439982464 in words is "two hundred eighteen trillion, two hundred eighty-six billion, four hundred thirty-nine million, nine hundred eighty-two thousand, four hundred sixty-four".