51853386868556 has 192 divisors, whose sum is σ = 113110375504896. Its totient is φ = 20253353702400.

The previous prime is 51853386868519. The next prime is 51853386868651. The reversal of 51853386868556 is 65586868335815.

51853386868556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 63 ways as a sum of consecutive naturals, for example, 7879253186 + ... + 7879259766.

It is an arithmetic number, because the mean of its divisors is an integer number (589116539088).

Almost surely, 2^{51853386868556} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51853386868556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56555187752448).

51853386868556 is an abundant number, since it is smaller than the sum of its proper divisors (61256988636340).

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

51853386868556 is a wasteful number, since it uses less digits than its factorization.

51853386868556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7552 (or 7550 counting only the distinct ones).

The product of its digits is 4976640000, while the sum is 77.

The spelling of 51853386868556 in words is "fifty-one trillion, eight hundred fifty-three billion, three hundred eighty-six million, eight hundred sixty-eight thousand, five hundred fifty-six".