561800204 has 48 divisors (see below), whose sum is σ = 1156572480. Its totient is φ = 233763840.

The previous prime is 561800137. The next prime is 561800221. The reversal of 561800204 is 402008165.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261824 + ... + 263960.

It is an arithmetic number, because the mean of its divisors is an integer number (24095260).

Almost surely, 2^561800204 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 561800204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (578286240).

561800204 is an abundant number, since it is smaller than the sum of its proper divisors (594772276).

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

561800204 is a wasteful number, since it uses less digits than its factorization.

561800204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2418 (or 2416 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 561800204 is about 23702.3248648735. The cubic root of 561800204 is about 825.1393478730.

Adding to 561800204 its reverse (402008165), we get a palindrome (963808369).

The spelling of 561800204 in words is "five hundred sixty-one million, eight hundred thousand, two hundred four".