561000105609 has 8 divisors (see below), whose sum is σ = 762113351232. Its totient is φ = 366943465200.

The previous prime is 561000105599. The next prime is 561000105649. The reversal of 561000105609 is 906501000165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 561000105609 - 2⁵ = 561000105577 is a prime.

It is a super-2 number, since 2×561000105609² (a number of 24 digits) contains 22 as substring.

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 561000105609.

It is not an unprimeable number, because it can be changed into a prime (561000105649) 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 7 ways as a sum of consecutive naturals, for example, 1764151117 + ... + 1764151434.

It is an arithmetic number, because the mean of its divisors is an integer number (95264168904).

Almost surely, 2^561000105609 is an apocalyptic number.

It is an amenable number.

561000105609 is a deficient number, since it is larger than the sum of its proper divisors (201113245623).

561000105609 is a wasteful number, since it uses less digits than its factorization.

561000105609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3528302607.

The product of its (nonzero) digits is 8100, while the sum is 33.

The spelling of 561000105609 in words is "five hundred sixty-one billion, one hundred five thousand, six hundred nine".