The world's highest denomination note is Hungary 100 Million B-Pengo (American 100 Quintillion Pengo)*, issued in 1946. That's 100,000,000,000,000,000,000 Pengo. It was worth about U.S. $0.20 in 1946. Hungary also printed a 1 Milliard B-Pengo (Amerian 1 Sextillion Pengo)*, 1,000,000,000,000,000,000,000 Pengo, note in 1946. Overtaken by inflation, it was never in circulation.