561704868 has 60 divisors (see below), whose sum is σ = 1474471152. Its totient is φ = 186462000.

The previous prime is 561704863. The next prime is 561704887. The reversal of 561704868 is 868407165.

It is a happy number.

561704868 is a `hidden beast` number, since 561 + 7 + 0 + 4 + 86 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (561704861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 77871 + ... + 84777.

Almost surely, 2^561704868 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 561704868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (737235576).

561704868 is an abundant number, since it is smaller than the sum of its proper divisors (912766284).

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

561704868 is a wasteful number, since it uses less digits than its factorization.

561704868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7174 (or 7163 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 561704868 is about 23700.3136688104. The cubic root of 561704868 is about 825.0926705818.

The spelling of 561704868 in words is "five hundred sixty-one million, seven hundred four thousand, eight hundred sixty-eight".