561564676 has 24 divisors (see below), whose sum is σ = 993728736. Its totient is φ = 277652160.

The previous prime is 561564629. The next prime is 561564709. The reversal of 561564676 is 676465165.

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, 366031 + ... + 367561.

It is an arithmetic number, because the mean of its divisors is an integer number (41405364).

Almost surely, 2^561564676 is an apocalyptic number.

It is an amenable number.

561564676 is a deficient number, since it is larger than the sum of its proper divisors (432164060).

561564676 is a wasteful number, since it uses less digits than its factorization.

561564676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2499 (or 2497 counting only the distinct ones).

The product of its digits is 907200, while the sum is 46.

The square root of 561564676 is about 23697.3558862587. The cubic root of 561564676 is about 825.0240218289.

The spelling of 561564676 in words is "five hundred sixty-one million, five hundred sixty-four thousand, six hundred seventy-six".