I have never seen a stock trade 2,147,483,647 shares in one day!
The actual number of shares is greater than that. That's the maximum value that a 32-bit signed integer number can hold. Some firms either stopped at that volume or wrapped around to a negative number. Volumes don't usually get that high.
The number is correct. The Largest number for a 32 bit integer is 456,361,781,294,281.