561590638 has 32 divisors (see below), whose sum is σ = 1015430400. Its totient is φ = 227556864.

The previous prime is 561590611. The next prime is 561590647. The reversal of 561590638 is 836095165.

561590638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 561590594 and 561590603.

It is a congruent number.

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, 151653 + ... + 155311.

It is an arithmetic number, because the mean of its divisors is an integer number (31732200).

Almost surely, 2^561590638 is an apocalyptic number.

561590638 is a deficient number, since it is larger than the sum of its proper divisors (453839762).

561590638 is a wasteful number, since it uses less digits than its factorization.

561590638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4264.

The product of its (nonzero) digits is 194400, while the sum is 43.

The square root of 561590638 is about 23697.9036625605. The cubic root of 561590638 is about 825.0367356767.

The spelling of 561590638 in words is "five hundred sixty-one million, five hundred ninety thousand, six hundred thirty-eight".