218308814329056 has 96 divisors (see below), whose sum is σ = 625183590100608. Its totient is φ = 66151378659840.

The previous prime is 218308814329043. The next prime is 218308814329063. The reversal of 218308814329056 is 650923418803812.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×218308814329056² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 20575206 + ... + 29325018.

It is an arithmetic number, because the mean of its divisors is an integer number (6512329063548).

Almost surely, 2^{218308814329056} is an apocalyptic number.

It is an amenable number.

218308814329056 is an abundant number, since it is smaller than the sum of its proper divisors (406874775771552).

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

218308814329056 is a wasteful number, since it uses less digits than its factorization.

218308814329056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8773464 (or 8773456 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 60.

The spelling of 218308814329056 in words is "two hundred eighteen trillion, three hundred eight billion, eight hundred fourteen million, three hundred twenty-nine thousand, fifty-six".