Fatto matematico: 4614 is the number of ways to stack 27 pennies in contiguous rows so that each penny lies on the table or on two pennies.
Trivia: 4614 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: August 18th is the day in 1838 that the Wilkes Expedition, which would explore the Puget Sound and Antarctica, weighs anchor at Hampton Roads in 1838.