With these specs.. 10 minute blocks, difficulty recalculation every 14 days, and the sha256 hashing algorithm
The coin is easily killed. Anyone with bitcoin miners can redirect their hashes to your coin, drive up difficulty and then leave. Your chain will be stuck on high difficulty.
-edit-
LOL! just noticed 8.6 trillion coins. haha. funny.
That's always a risk, but hopefully we'll be able to maintain a high hash rate if the coin has value