561116812 has 24 divisors (see below), whose sum is σ = 995635872. Its totient is φ = 276672000.

The previous prime is 561116789. The next prime is 561116867. The reversal of 561116812 is 218611165.

561116812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103612 + ... + 108892.

It is an arithmetic number, because the mean of its divisors is an integer number (41484828).

Almost surely, 2^561116812 is an apocalyptic number.

It is an amenable number.

561116812 is a deficient number, since it is larger than the sum of its proper divisors (434519060).

561116812 is a wasteful number, since it uses less digits than its factorization.

561116812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5649 (or 5647 counting only the distinct ones).

The product of its digits is 2880, while the sum is 31.

The square root of 561116812 is about 23687.9043395569. The cubic root of 561116812 is about 824.8046366916.

Adding to 561116812 its reverse (218611165), we get a palindrome (779727977).

The spelling of 561116812 in words is "five hundred sixty-one million, one hundred sixteen thousand, eight hundred twelve".