As of the close of business on Friday, Sept, 30, the last day of fiscal 2016, the total federal debt was $19,573,444,713,936.79. At that point, the total federal debt had increased under Obama by $8,946,567,665,023.71.
National debt -- Jan. 2009: $10.616 trillion; Jan. 2013: $16.432 trillion (At $5.8 trillion, it's the largest increase in the national debt under one president.