Hecho general: 85816 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 85816 is an uninteresting number.
Trivia: 85816 is an uninteresting number.
Fecha histórica: December 15th is the day in 1467 that Stephen III of Moldavia defeats Matthias Corvinus of Hungary, with the latter being injured thrice, at the Battle of Baia.