561786687105 has 32 divisors (see below), whose sum is σ = 1071930875904. Its totient is φ = 245650823616.

The previous prime is 561786687103. The next prime is 561786687157. The reversal of 561786687105 is 501786687165.

It is a happy number.

It is not a de Polignac number, because 561786687105 - 2¹ = 561786687103 is a prime.

It is a super-2 number, since 2×561786687105² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (561786687101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116309529 + ... + 116314358.

It is an arithmetic number, because the mean of its divisors is an integer number (33497839872).

Almost surely, 2^561786687105 is an apocalyptic number.

It is an amenable number.

561786687105 is a deficient number, since it is larger than the sum of its proper divisors (510144188799).

561786687105 is a wasteful number, since it uses less digits than its factorization.

561786687105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232623925.

The product of its (nonzero) digits is 16934400, while the sum is 60.

Adding to 561786687105 its sum of digits (60), we get a palindrome (561786687165).

The spelling of 561786687105 in words is "five hundred sixty-one billion, seven hundred eighty-six million, six hundred eighty-seven thousand, one hundred five".