561722745 has 16 divisors (see below), whose sum is σ = 946059840. Its totient is φ = 283817664.

The previous prime is 561722741. The next prime is 561722747. The reversal of 561722745 is 547227165.

It is not a de Polignac number, because 561722745 - 2² = 561722741 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561722741) 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 15 ways as a sum of consecutive naturals, for example, 985194 + ... + 985763.

It is an arithmetic number, because the mean of its divisors is an integer number (59128740).

Almost surely, 2^561722745 is an apocalyptic number.

It is an amenable number.

561722745 is a deficient number, since it is larger than the sum of its proper divisors (384337095).

561722745 is a wasteful number, since it uses less digits than its factorization.

561722745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1970984.

The product of its digits is 117600, while the sum is 39.

The square root of 561722745 is about 23700.6908127168. The cubic root of 561722745 is about 825.1014237107.

The spelling of 561722745 in words is "five hundred sixty-one million, seven hundred twenty-two thousand, seven hundred forty-five".