I believe you have the number of zeroes wrong. But starting with "billion", there are two different definitions, sometimes called the "short scale" and the "long scale". This is one of the reasons that it is preferable to use scientific notation, to avoid this ambiguity.
there arent 2 numbers named a trecentillion. 10^312=trescentillion
10 followed by nine zeros: 10,000,000,000
10 followed by 5 zeros is 1,000,000 (one million). 100 followed by 3 zeros is 100,000 (one hundred thousand) so 10 followed by 5 zeros is greater.
7500 followed by 9 zeros; that is 75 followed by 11 zeros in all
1 followed by 18 zeros is a quintillion.
This is one case where you can be told to Google it ... because the answer is Google.
1 with 57 zeros
There is no highest number; but some well known big numbers are the googol (which is 10 followed by 100 zeros) or a googolplex which is 10 followed by a googol zeros. numbers never ever stop.
10 followed by nine zeros: 10,000,000,000
No, but a googol (after which the search engine Google was named as a pun) does - a googol is 10100 which is a one followed by 100 zeros.
Google isn't a number. The search engine Google used that name as it is a pun on Googol which is a number, and is 10¹⁰⁰ which is a 1 followed by 100 zeros 10¹⁰⁰ + 1 (a 1 followed by 99 zeros followed by another 1), 10¹⁰⁰ + 2 (a 1 followed by 99 zeros followed by a 2), 10¹⁰⁰ + 3 (a 1 followed by 99 zeros followed by a 3), ... are bigger than a googol, so yes, there are numbers bigger than a googol. A googolplex is 10^googol = 10^(10¹⁰⁰) = 10^(100...0) where there are 100 zeros in the power of the 10; it is a 1 followed by a googol (ie 10¹⁰⁰) zeros. In fact there are infinitely many numbers greater than a googol as the counting numbers (1, 2, 3, ...) can each be added to a googol, and there are infinitely many counting numbers.
in my agenda at school, there is a little fact that the number centrillion, has 500 zeros. but, there is probaby a higher number out there. a googol is 1 followed by 100 zeros, but higher named number is a googolplex which is one followed by googol number of zeros - that's a lot of zeros!
If you mean the number google, then it is a 1 followed by 100 zeros.
A googolplexian is 1 followed by a googolplex of zeros, a googolplex is 1 followed by a googol of zeros and a googol is 1 followed by 100 zeros.
In English-speeking countries, that would usually be a 1, followed by 12 zeros. In some other countries it's a 1, followed by 18 zeros.
10 followed by 5 zeros is 1,000,000 (one million). 100 followed by 3 zeros is 100,000 (one hundred thousand) so 10 followed by 5 zeros is greater.
a googol? Nope that is 1 followed by one hundred zeros. A googolplex is one followed by a googol zeros. There is no broadly accepted name for 1 followed by one million zeros.
7500 followed by 9 zeros; that is 75 followed by 11 zeros in all