51813500716656 has 120 divisors (see below), whose sum is σ = 167241334763360. Its totient is φ = 14668042111488.

The previous prime is 51813500716639. The next prime is 51813500716667. The reversal of 51813500716656 is 65661700531815.

51813500716656 is a `hidden beast` number, since 5 + 1 + 8 + 1 + 3 + 500 + 71 + 6 + 65 + 6 = 666.

51813500716656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 23 ways as a sum of consecutive naturals, for example, 235680415 + ... + 235900158.

Almost surely, 2^{51813500716656} is an apocalyptic number.

51813500716656 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

51813500716656 is an abundant number, since it is smaller than the sum of its proper divisors (115427834046704).

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

51813500716656 is a wasteful number, since it uses less digits than its factorization.

51813500716656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471580703 (or 471580694 counting only the distinct ones).

The product of its (nonzero) digits is 4536000, while the sum is 54.

The spelling of 51813500716656 in words is "fifty-one trillion, eight hundred thirteen billion, five hundred million, seven hundred sixteen thousand, six hundred fifty-six".