561727845 has 32 divisors (see below), whose sum is σ = 1141290240. Its totient is φ = 256789440.

The previous prime is 561727807. The next prime is 561727871. The reversal of 561727845 is 548727165.

561727845 is a `hidden beast` number, since 5 + 617 + 27 + 8 + 4 + 5 = 666.

561727845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 561727845 - 2⁷ = 561727717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 561727845.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 296266 + ... + 298155.

It is an arithmetic number, because the mean of its divisors is an integer number (35665320).

Almost surely, 2^561727845 is an apocalyptic number.

It is an amenable number.

561727845 is an abundant number, since it is smaller than the sum of its proper divisors (579562395).

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

561727845 is a wasteful number, since it uses less digits than its factorization.

561727845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594442 (or 594436 counting only the distinct ones).

The product of its digits is 470400, while the sum is 45.

The square root of 561727845 is about 23700.7984042732. The cubic root of 561727845 is about 825.1039207934.

The spelling of 561727845 in words is "five hundred sixty-one million, seven hundred twenty-seven thousand, eight hundred forty-five".