218524085387864 has 32 divisors (see below), whose sum is σ = 434800805418000. Its totient is φ = 102605832806400.

The previous prime is 218524085387863. The next prime is 218524085387887. The reversal of 218524085387864 is 468783580425812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218524085387863) 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, 1789242662 + ... + 1789364789.

Almost surely, 2^{218524085387864} is an apocalyptic number.

It is an amenable number.

218524085387864 is a deficient number, since it is larger than the sum of its proper divisors (216276720030136).

218524085387864 is a wasteful number, since it uses less digits than its factorization.

218524085387864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3578607923 (or 3578607919 counting only the distinct ones).

The product of its (nonzero) digits is 825753600, while the sum is 71.

The spelling of 218524085387864 in words is "two hundred eighteen trillion, five hundred twenty-four billion, eighty-five million, three hundred eighty-seven thousand, eight hundred sixty-four".