What is the decision that goes into not giving a name to a work of art? This is lovely and evokes a feeling of uneasiness in me, but why don't you give a name to your work? I see this with a lot of art on newgrounds, where someone will post something called "Untitled_54" or something, or in this case "543368". I suppose if that's the name, that's the name. But a title for any work of art, music, literature, etc. gives you a piece of the artist.
I suppose if your goal is to make the meaning of this piece completely up to the viewer, then you've succeeded, but art is a piece of the artist. Your interpretation is more valuable than mine.
Either way, great work.