561616544 has 24 divisors (see below), whose sum is σ = 1107081108. Its totient is φ = 280453120.

The previous prime is 561616541. The next prime is 561616577. The reversal of 561616544 is 445616165.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 484528144 + 77088400 = 22012^2 + 8780^2 .

It is a junction number, because it is equal to n+sod(n) for n = 561616498 and 561616507.

It is not an unprimeable number, because it can be changed into a prime (561616541) by changing a digit.

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, 15584 + ... + 36960.

Almost surely, 2^561616544 is an apocalyptic number.

It is an amenable number.

561616544 is a deficient number, since it is larger than the sum of its proper divisors (545464564).

561616544 is a wasteful number, since it uses less digits than its factorization.

561616544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22208 (or 22200 counting only the distinct ones).

The product of its digits is 86400, while the sum is 38.

The square root of 561616544 is about 23698.4502446890. The cubic root of 561616544 is about 825.0494217103.

The spelling of 561616544 in words is "five hundred sixty-one million, six hundred sixteen thousand, five hundred forty-four".