51803800385860 has 48 divisors (see below), whose sum is σ = 112541387137200. Its totient is φ = 20006612240384.

The previous prime is 51803800385719. The next prime is 51803800385867. The reversal of 51803800385860 is 6858300830815.

51803800385860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 3748847205636 + 48054953180224 = 1936194^2 + 6932168^2 .

It is not an unprimeable number, because it can be changed into a prime (51803800385867) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 31402584 + ... + 33011056.

It is an arithmetic number, because the mean of its divisors is an integer number (2344612232025).

Almost surely, 2^{51803800385860} is an apocalyptic number.

It is an amenable number.

51803800385860 is an abundant number, since it is smaller than the sum of its proper divisors (60737586751340).

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

51803800385860 is a wasteful number, since it uses less digits than its factorization.

51803800385860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664040 (or 1664038 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 55.

The spelling of 51803800385860 in words is "fifty-one trillion, eight hundred three billion, eight hundred million, three hundred eighty-five thousand, eight hundred sixty".