How many satoshi makes 1 dollar?

I'm curious to know, could you please elaborate on the conversion rate between satoshi and dollars? Specifically, I'm wondering how many satoshi would equal one dollar. Given the dynamic nature of cryptocurrency values, is there a reliable method or resource to determine this conversion in real-time? Also, are there any factors that can significantly influence the exchange rate between satoshi and dollars, and how does one stay updated on these fluctuations?