218550839359378 has 16 divisors (see below), whose sum is σ = 335822660764920. Its totient is φ = 106609962585600.

The previous prime is 218550839359361. The next prime is 218550839359543. The reversal of 218550839359378 is 873953938055812.

It can be written as a sum of positive squares in 4 ways, for example, as 102473853505969 + 116076985853409 = 10122937^2 + 10773903^2 .

It is an unprimeable number.

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, 46557238 + ... + 51036046.

Almost surely, 2^{218550839359378} is an apocalyptic number.

218550839359378 is a deficient number, since it is larger than the sum of its proper divisors (117271821405542).

218550839359378 is a wasteful number, since it uses less digits than its factorization.

218550839359378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5073933.

The product of its (nonzero) digits is 1959552000, while the sum is 76.

The spelling of 218550839359378 in words is "two hundred eighteen trillion, five hundred fifty billion, eight hundred thirty-nine million, three hundred fifty-nine thousand, three hundred seventy-eight".