561040444 has 12 divisors (see below), whose sum is σ = 982007824. Its totient is φ = 280466784.

The previous prime is 561040439. The next prime is 561040453. The reversal of 561040444 is 444040165.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18937 + ... + 38479.

Almost surely, 2^561040444 is an apocalyptic number.

It is an amenable number.

561040444 is a deficient number, since it is larger than the sum of its proper divisors (420967380).

561040444 is a wasteful number, since it uses less digits than its factorization.

561040444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26724 (or 26722 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 561040444 is about 23686.2923227761. The cubic root of 561040444 is about 824.7672163559.

The spelling of 561040444 in words is "five hundred sixty-one million, forty thousand, four hundred forty-four".