561560556 has 24 divisors (see below), whose sum is σ = 1319738560. Its totient is φ = 185839632.

The previous prime is 561560539. The next prime is 561560557. The reversal of 561560556 is 655065165.

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 7 ways as a sum of consecutive naturals, for example, 166666 + ... + 170001.

Almost surely, 2^561560556 is an apocalyptic number.

It is an amenable number.

561560556 is an abundant number, since it is smaller than the sum of its proper divisors (758178004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561560556 is a wasteful number, since it uses less digits than its factorization.

561560556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336813 (or 336811 counting only the distinct ones).

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

The square root of 561560556 is about 23697.2689565697. The cubic root of 561560556 is about 825.0220041881.

The spelling of 561560556 in words is "five hundred sixty-one million, five hundred sixty thousand, five hundred fifty-six".