$BTC Satoshi is the smallest unit of Bitcoin, named after the anonymous creator of Bitcoin, Satoshi Nakamoto. One Satoshi is equivalent to 0.00000001 BTC, meaning there are 100 million Satoshis in one Bitcoin. This small unit allows Bitcoin transactions to be divided into very small amounts, facilitating microtransactions and increasing the flexibility of using Bitcoin for various purposes. Splitting Bitcoin into Satoshis makes it easier for users to buy, sell, and exchange Bitcoin in smaller quantities, making it more accessible to many people.