Bitcoins values are stored in 64-bit integers, with 1 BTC stored as 100,000,000 which gives plenty of room to fractionalize, since it's stored as if it where a

Bitcoins values are stored in 64-bit integers, with 1 BTC stored as 100,000,000 which gives plenty of room to fractionalize, since it's stored as if it where a double-precision number.