561560553 has 16 divisors (see below), whose sum is σ = 860630400. Its totient is φ = 361463760.

The previous prime is 561560539. The next prime is 561560557. The reversal of 561560553 is 355065165.

561560553 is a `hidden beast` number, since 56 + 1 + 56 + 0 + 553 = 666.

It is not a de Polignac number, because 561560553 - 2¹⁰ = 561559529 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (561560557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 357813 + ... + 359378.

It is an arithmetic number, because the mean of its divisors is an integer number (53789400).

Almost surely, 2^561560553 is an apocalyptic number.

It is an amenable number.

561560553 is a deficient number, since it is larger than the sum of its proper divisors (299069847).

561560553 is a wasteful number, since it uses less digits than its factorization.

561560553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717229 (or 717223 counting only the distinct ones).

The product of its (nonzero) digits is 67500, while the sum is 36.

The square root of 561560553 is about 23697.2688932712. The cubic root of 561560553 is about 825.0220027190.

The spelling of 561560553 in words is "five hundred sixty-one million, five hundred sixty thousand, five hundred fifty-three".