quintillion

num

1. (Australian, British, US, modern)Either of two very large amounts:

   “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.”

2. (Australia, British, dated)Either of two very large amounts:
3. (colloquial, excessive)An unspecified very large number.

   “Near-synonyms: gazillion; see also Thesaurus:zillion”

   “He had like a quintillion excuses for why he couldn't meet his obligation to me.”

noun

1. (excessive, figuratively, slang)Any very large number, exceeding normal description.