Fatto generale: 64901 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 64901 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 64901 is an unremarkable number.
Data storica: September 9th is the day in 1379 that Treaty of Neuberg, splitting the Austrian Habsburg lands between the Habsburg Dukes Albert III and Leopold III.