51556766256 has 60 divisors (see below), whose sum is σ = 146263907608. Its totient is φ = 16950166272.

The previous prime is 51556766243. The next prime is 51556766273. The reversal of 51556766256 is 65266765515.

51556766256 is a `hidden beast` number, since 5 + 1 + 5 + 5 + 6 + 7 + 6 + 625 + 6 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2441770 + ... + 2462793.

Almost surely, 2^51556766256 is an apocalyptic number.

It is an amenable number.

51556766256 is an abundant number, since it is smaller than the sum of its proper divisors (94707141352).

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

51556766256 is a wasteful number, since it uses less digits than its factorization.

51556766256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4904650 (or 4904641 counting only the distinct ones).

The product of its digits is 11340000, while the sum is 54.

The spelling of 51556766256 in words is "fifty-one billion, five hundred fifty-six million, seven hundred sixty-six thousand, two hundred fifty-six".