The number 690452 is at the center of a viral TikTok trend known as the "heaven or hell number." Participants write this number on their wrist before sleeping, with the belief that it will transport them into a vivid, possibly terrifying dream or a parallel universe. Some claim that dying in these dreams could result in real-life death. Despite its eerie reputation, there's no scientific evidence supporting these claims; it's largely considered internet folklore that resurfaces periodically for entertainment purposes 

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