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What is stopping you for selling that number over and over again?, nobody knows the number anyway, as knowing the number is owning it.

What if two companies sell the same number to two different clients? Or they are forced to register the number as their own?

Which come back to owning a number, so if I said a number no matter is prime o no and I said it is mine then what?

LOL
If people can own numbers, can they own colors too?
:D

They can own what ever they want by this point, after all bitcoins are just numbers just the same?

I guess they are.
Its a weird idea still to me.
:D