561656055 has 32 divisors (see below), whose sum is σ = 950941440. Its totient is φ = 282286080.

The previous prime is 561656033. The next prime is 561656059. The reversal of 561656055 is 550656165.

It is not a de Polignac number, because 561656055 - 2⁹ = 561655543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561656059) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49900 + ... + 60110.

It is an arithmetic number, because the mean of its divisors is an integer number (29716920).

Almost surely, 2^561656055 is an apocalyptic number.

561656055 is a deficient number, since it is larger than the sum of its proper divisors (389285385).

561656055 is a wasteful number, since it uses less digits than its factorization.

561656055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10431.

The product of its (nonzero) digits is 135000, while the sum is 39.

The square root of 561656055 is about 23699.2838499394. The cubic root of 561656055 is about 825.0687692904.

The spelling of 561656055 in words is "five hundred sixty-one million, six hundred fifty-six thousand, fifty-five".