Hello how may I help you? Can you tell me what the longest thing in the world is? I can help with world records. Please ask a more specific question so I can fulfill your request. What is the longest river in the world? The Amazon River is the longest river in the world Okay what is the longest word in the English dictionary I am unable to find that world record for you. That's okay. How about the longest sentence ever spoken? That is too vague for me to answer or the record does not exist. Okay. Thanks for the info You are welcome.