561455590 has 16 divisors (see below), whose sum is σ = 1027188720. Its totient is φ = 220900320.

The previous prime is 561455579. The next prime is 561455591. The reversal of 561455590 is 95554165.

561455590 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561455591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 459600 + ... + 460819.

It is an arithmetic number, because the mean of its divisors is an integer number (64199295).

Almost surely, 2^561455590 is an apocalyptic number.

561455590 is a deficient number, since it is larger than the sum of its proper divisors (465733130).

561455590 is a wasteful number, since it uses less digits than its factorization.

561455590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920487.

The product of its (nonzero) digits is 135000, while the sum is 40.

The square root of 561455590 is about 23695.0541252811. The cubic root of 561455590 is about 824.9705970543.

The spelling of 561455590 in words is "five hundred sixty-one million, four hundred fifty-five thousand, five hundred ninety".