People whose mother language is anumeric (a language that has no way of expressing arbitrary numbers) struggle to compare and remember the exact size of collections of as little as four objects. This suggests that numeric abilities are intrinsically related to linguistic abilities.
An Australian man typed every number from 1 to 1,000,000 in words, not numbers, on his typewriter. It took him 16 years.
The world record for the largest number ever counted to belongs to Jeremy Harper. He streamed the entire process online , and raised money for charity. He reached 1,000,000. It took him 3 months.
In 2006, it took Akira Haraguchi, a retired Japanese engineer, 16 hours to recite the first 100,000 digits of pi from memory only. To prove that the exercise was legitimate, everything was filmed, even his trips to the toilet. Despite this, he has yet to receive a Guinness World Record.
Number 4 is considered an unlucky number in China because it is nearly homophonous to the word “death” (pinyin sǐ). In a study of five years’ worth of real estate sales in the greater Vancouver area, researchers found that houses in Chinese neighborhoods with an address containing a 4 sold for an average of $8,000 less than their luckier counterparts.
The type of number called the “Tuple” (Single, Double, Triple, Quadruple) goes past ten, twenty, even fifty! The tuple for 25 is Quinvigintuple, the tuple for 100 is centuple, the tuple for 8 is octuple, etc.
Daniel Tammet, an autistic savant who speaks 10 languages and has the rare capability to explain how his brain works, says numbers have shape, color, and texture. 289 is ugly, 333 attractive, and pi is beautiful. He holds the European record for reciting pi from memory to 22,514 digits in five hours and nine minutes.
Burma had an economic crisis in the late 80s because the president decided to cancel any currency that wasn’t divisible by 9 (his favorite number).
In English, the name of every number shares a letter with each neighbor. One shares an O with two, which shares a T with three, which shares an R with four, which shares an F with five, which shares an I with six — and so on indefinitely.