51820493268 has 48 divisors (see below), whose sum is σ = 124286291136. Its totient is φ = 16797580800.

The previous prime is 51820493251. The next prime is 51820493297. The reversal of 51820493268 is 86239402815.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 288658 + ... + 432393.

It is an arithmetic number, because the mean of its divisors is an integer number (2589297732).

Almost surely, 2^51820493268 is an apocalyptic number.

It is an amenable number.

51820493268 is an abundant number, since it is smaller than the sum of its proper divisors (72465797868).

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

51820493268 is a wasteful number, since it uses less digits than its factorization.

51820493268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721224 (or 721222 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 51820493268 in words is "fifty-one billion, eight hundred twenty million, four hundred ninety-three thousand, two hundred sixty-eight".