561853800 has 96 divisors (see below), whose sum is σ = 1935292800. Its totient is φ = 149826240.

The previous prime is 561853793. The next prime is 561853811. The reversal of 561853800 is 8358165.

561853800 is a `hidden beast` number, since 5 + 618 + 5 + 38 + 0 + 0 = 666.

561853800 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46624 + ... + 57423.

It is an arithmetic number, because the mean of its divisors is an integer number (20159300).

Almost surely, 2^561853800 is an apocalyptic number.

561853800 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

561853800 is an abundant number, since it is smaller than the sum of its proper divisors (1373439000).

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

561853800 is a wasteful number, since it uses less digits than its factorization.

561853800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104072 (or 104057 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 561853800 is about 23703.4554443018. The cubic root of 561853800 is about 825.1655865974.

The spelling of 561853800 in words is "five hundred sixty-one million, eight hundred fifty-three thousand, eight hundred".