Fatto matematico: 1816 is the number of partitions of 44 into distinct parts.
Trivia: 1816 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: December 20th is the day in 2007 that Elizabeth II becomes the oldest ever monarch of the United Kingdom, surpassing Queen Victoria, who lived for 81 years, 7 months and 29 days.