561560554 has 4 divisors (see below), whose sum is σ = 842340834. Its totient is φ = 280780276.

The previous prime is 561560539. The next prime is 561560557. The reversal of 561560554 is 455065165.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 322023025 + 239537529 = 17945^2 + 15477^2 .

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 as a sum of consecutive naturals, namely, 140390137 + ... + 140390140.

Almost surely, 2^561560554 is an apocalyptic number.

561560554 is a deficient number, since it is larger than the sum of its proper divisors (280780280).

561560554 is a wasteful number, since it uses less digits than its factorization.

561560554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280780279.

The product of its (nonzero) digits is 90000, while the sum is 37.

The square root of 561560554 is about 23697.2689143707. The cubic root of 561560554 is about 825.0220032087.

The spelling of 561560554 in words is "five hundred sixty-one million, five hundred sixty thousand, five hundred fifty-four".