561000105605 has 8 divisors (see below), whose sum is σ = 689619642264. Its totient is φ = 437853740800.

The previous prime is 561000105599. The next prime is 561000105649. The reversal of 561000105605 is 506501000165.

It can be written as a sum of positive squares in 4 ways, for example, as 5916994084 + 555083111521 = 76922^2 + 745039^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-561000105605 is a prime.

It is a super-2 number, since 2×561000105605² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 1368292736 + ... + 1368293145.

It is an arithmetic number, because the mean of its divisors is an integer number (86202455283).

Almost surely, 2^561000105605 is an apocalyptic number.

It is an amenable number.

561000105605 is a deficient number, since it is larger than the sum of its proper divisors (128619536659).

561000105605 is a wasteful number, since it uses less digits than its factorization.

561000105605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2736585927.

The product of its (nonzero) digits is 4500, while the sum is 29.

The spelling of 561000105605 in words is "five hundred sixty-one billion, one hundred five thousand, six hundred five".