561823834 has 16 divisors (see below), whose sum is σ = 990067680. Its totient is φ = 235730160.

The previous prime is 561823817. The next prime is 561823879. The reversal of 561823834 is 438328165.

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 7 ways as a sum of consecutive naturals, for example, 981924 + ... + 982495.

It is an arithmetic number, because the mean of its divisors is an integer number (61879230).

Almost surely, 2^561823834 is an apocalyptic number.

561823834 is a deficient number, since it is larger than the sum of its proper divisors (428243846).

561823834 is a wasteful number, since it uses less digits than its factorization.

561823834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1964445.

The product of its digits is 138240, while the sum is 40.

The square root of 561823834 is about 23702.8233339406. The cubic root of 561823834 is about 825.1509164990.

The spelling of 561823834 in words is "five hundred sixty-one million, eight hundred twenty-three thousand, eight hundred thirty-four".