It is an exponent and means that the number is to be raised by that power as foe example 43 means 4*4*4 = 64
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Yes, it is called google, which equals to 10100 or 1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
Well, isn't that a happy little question! A 35-digit number is often called a "thirty-five digit number." It's like having a big, colorful palette of numbers to create all sorts of beautiful mathematical landscapes. Just remember, there are no mistakes in math, only happy little accidents waiting to be discovered!
x2 means "x squared" aka "x to the power of 2"
MCMLXXIVTo add to the above, 1974 in Roman Numerals is written MCMLXXIV.M is 1000, CM is 1000 - 100 = 900, LXX is 50 + 10 + 10 = 70, IV is 5 - 1 = 4.So one thousand nine hundred seventy four.It is a bit kinky but learnable. Basically, little number before big number is subtracted. Little number after big number is added. Oversimplified, but you need to learn the basic numbers (letters) 1,2,3,5,10,50,100,1000 - I,II,III,V,X,L,C,M. The other numbers are made from these by either subtracting or adding.
Very big... Scientists probably don't have an answer for something like that. But, the highest known number, which is a number (infinity is not), is either google, google plex, or centillion.