561804263 has 16 divisors (see below), whose sum is σ = 594350400. Its totient is φ = 530323200.

The previous prime is 561804259. The next prime is 561804317. The reversal of 561804263 is 362408165.

It is a cyclic number.

It is not a de Polignac number, because 561804263 - 2² = 561804259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561804163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 300953 + ... + 302813.

It is an arithmetic number, because the mean of its divisors is an integer number (37146900).

Almost surely, 2^561804263 is an apocalyptic number.

561804263 is a deficient number, since it is larger than the sum of its proper divisors (32546137).

561804263 is a wasteful number, since it uses less digits than its factorization.

561804263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2138.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 561804263 is about 23702.4104892308. The cubic root of 561804263 is about 825.1413350756.

The spelling of 561804263 in words is "five hundred sixty-one million, eight hundred four thousand, two hundred sixty-three".