561722561695 has 4 divisors (see below), whose sum is σ = 674067074040. Its totient is φ = 449378049352.

The previous prime is 561722561689. The next prime is 561722561723. The reversal of 561722561695 is 596165227165.

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

It is a cyclic number.

It is not a de Polignac number, because 561722561695 - 2⁷ = 561722561567 is a prime.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 56172256165 + ... + 56172256174.

It is an arithmetic number, because the mean of its divisors is an integer number (168516768510).

Almost surely, 2^561722561695 is an apocalyptic number.

561722561695 is a deficient number, since it is larger than the sum of its proper divisors (112344512345).

561722561695 is a wasteful number, since it uses less digits than its factorization.

561722561695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112344512344.

The product of its digits is 6804000, while the sum is 55.

The spelling of 561722561695 in words is "five hundred sixty-one billion, seven hundred twenty-two million, five hundred sixty-one thousand, six hundred ninety-five".