51243476800 has 42 divisors (see below), whose sum is σ = 126090984038. Its totient is φ = 20497390080.

The previous prime is 51243476797. The next prime is 51243476833. The reversal of 51243476800 is 867434215.

It can be written as a sum of positive squares in 3 ways, for example, as 6546751744 + 44696725056 = 80912^2 + 211416^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16011987 + ... + 16015186.

Almost surely, 2^51243476800 is an apocalyptic number.

51243476800 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51243476800 is an abundant number, since it is smaller than the sum of its proper divisors (74847507238).

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

51243476800 is a wasteful number, since it uses less digits than its factorization.

51243476800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32027195 (or 32027180 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The spelling of 51243476800 in words is "fifty-one billion, two hundred forty-three million, four hundred seventy-six thousand, eight hundred".