quintillion

1. Either of two very large amounts:Examples: "Last week, we used[…]the BBC News website's biggest number: 9,223,372,036,854,775,808, that's 9.2 quintillion[…][the maximum video viewer count on YouTube's] updated counter software."; "“I’m not sure I understand why we have to send a quadrillion-credit mission to another galaxy.” He looked fleetingly amused. “Quintillion... and we don’t have a choice, Harper. Any of us, really, but humanity especially.”"; "You are currently logged on to the largest version of the internet that has ever existed. By clicking and scrolling, you’re one of the 5 billion–plus people contributing to an unfathomable array of networked information—quintillions of bytes produced each day."Synonyms: trillion[long scale]]>AustralianBritishUSmodern

2. Either of two very large amounts:Synonyms: nonillionAustraliaBritishdated

3. (colloquial, hyperbolic) An unspecified very large number.Examples: "Near-synonyms: gazillion; see also Thesaurus:zillion"; "He had like a quintillion excuses for why he couldn't meet his obligation to me."colloquialexcessive