561111112 has 32 divisors (see below), whose sum is σ = 1115282520. Its totient is φ = 263741440.

The previous prime is 561111107. The next prime is 561111157. The reversal of 561111112 is 211111165.

It can be written as a sum of positive squares in 4 ways, for example, as 482505156 + 78605956 = 21966^2 + 8866^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 561111112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147312 + ... + 151072.

Almost surely, 2^561111112 is an apocalyptic number.

It is an amenable number.

561111112 is a deficient number, since it is larger than the sum of its proper divisors (554171408).

561111112 is a wasteful number, since it uses less digits than its factorization.

561111112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4881 (or 4877 counting only the distinct ones).

The product of its digits is 60, while the sum is 19.

The square root of 561111112 is about 23687.7840246824. The cubic root of 561111112 is about 824.8018438076.

Adding to 561111112 its reverse (211111165), we get a palindrome (772222277).

The spelling of 561111112 in words is "five hundred sixty-one million, one hundred eleven thousand, one hundred twelve".