51821166388328 has 16 divisors (see below), whose sum is σ = 102278617872000. Its totient is φ = 24546868289136.

The previous prime is 51821166388289. The next prime is 51821166388363. The reversal of 51821166388328 is 82388366112815.

It is a super-4 number, since 4×51821166388328⁴ (a number of 56 digits) contains 4444 as substring.

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, 170464362968 + ... + 170464363271.

It is an arithmetic number, because the mean of its divisors is an integer number (6392413617000).

Almost surely, 2^{51821166388328} is an apocalyptic number.

It is an amenable number.

51821166388328 is a deficient number, since it is larger than the sum of its proper divisors (50457451483672).

51821166388328 is a wasteful number, since it uses less digits than its factorization.

51821166388328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340928726264 (or 340928726260 counting only the distinct ones).

The product of its digits is 26542080, while the sum is 62.

The spelling of 51821166388328 in words is "fifty-one trillion, eight hundred twenty-one billion, one hundred sixty-six million, three hundred eighty-eight thousand, three hundred twenty-eight".