218268536944 has 20 divisors (see below), whose sum is σ = 422919889480. Its totient is φ = 109127920320.

The previous prime is 218268536933. The next prime is 218268536989. The reversal of 218268536944 is 449635862812.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106674 + ... + 669265.

It is an arithmetic number, because the mean of its divisors is an integer number (21145994474).

Almost surely, 2^218268536944 is an apocalyptic number.

It is an amenable number.

218268536944 is a deficient number, since it is larger than the sum of its proper divisors (204651352536).

218268536944 is a wasteful number, since it uses less digits than its factorization.

218268536944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793528 (or 793522 counting only the distinct ones).

The product of its digits is 19906560, while the sum is 58.

The spelling of 218268536944 in words is "two hundred eighteen billion, two hundred sixty-eight million, five hundred thirty-six thousand, nine hundred forty-four".