561550105611 has 12 divisors (see below), whose sum is σ = 884866833240. Its totient is φ = 340333397280.

The previous prime is 561550105591. The next prime is 561550105621. The reversal of 561550105611 is 116501055165.

It is a happy number.

561550105611 is a `hidden beast` number, since 56 + 1 + 550 + 1 + 0 + 56 + 1 + 1 = 666.

It is not a de Polignac number, because 561550105611 - 2⁹ = 561550105099 is a prime.

It is a super-2 number, since 2×561550105611² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (561550105621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2836111546 + ... + 2836111743.

It is an arithmetic number, because the mean of its divisors is an integer number (73738902770).

Almost surely, 2^561550105611 is an apocalyptic number.

561550105611 is a deficient number, since it is larger than the sum of its proper divisors (323316727629).

561550105611 is a wasteful number, since it uses less digits than its factorization.

561550105611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5672223306 (or 5672223303 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 36.

The spelling of 561550105611 in words is "five hundred sixty-one billion, five hundred fifty million, one hundred five thousand, six hundred eleven".