51489543800 has 48 divisors (see below), whose sum is σ = 121058323200. Its totient is φ = 20364396800.

The previous prime is 51489543773. The next prime is 51489543803. The reversal of 51489543800 is 834598415.

It is a happy number.

51489543800 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 not an unprimeable number, because it can be changed into a prime (51489543803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1428536 + ... + 1464135.

It is an arithmetic number, because the mean of its divisors is an integer number (2522048400).

Almost surely, 2^51489543800 is an apocalyptic number.

51489543800 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51489543800 is an abundant number, since it is smaller than the sum of its proper divisors (69568779400).

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

51489543800 is a wasteful number, since it uses less digits than its factorization.

51489543800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2892776 (or 2892767 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 47.

The spelling of 51489543800 in words is "fifty-one billion, four hundred eighty-nine million, five hundred forty-three thousand, eight hundred".