i think you need to check the links first before posting a comment next time.
there was no "2 billion transfer in a single transaction", you are just making an assumption based on the title of this topic. if you go to the link posted by OP you can see that $2 billion (which OP is rounding up from $1.9) is the total received in 4333 transactions.
You're right. Total received 475,363 BTC. The last transaction has been performed on July 19, 2014, transferring 9,141 BTC.
At that time, the Bitcoin price was about $650. I just calculated the entire amount in US dollars and got another result:
475,363 * $650 = $308,985,950 (~300 million dollars)
I'm realizing where the OP numbers coming from. Today's BTC price is $4000:
475,363 * $4000 = $1,901,452,000 (~2 billion dollars)
In any case, the final balance is 0 BTC, and this Bitcoin address is already empty.