I'd be interested to know how you're defining "word" -- it seems entirely arbitrary. The English language doesn't have any hard-and-fast rules about what a word is. There are a lot of things you could make that fit

most words, but English is an evolving language and every rule you might think of has probably been broken.

But anyway, what exactly do you mean by making "your own assessment" of the number? There's not much to understand about it -- you don't really gain anything by knowing all 38 digits and mathematically speaking there's nothing unique about the number.

Concerning software, if you just want a calculator with lots of digits of precision,

Microsoft's PowerToy Calculator works fine (and is nice to have around anyway) -- it goes up to 512 digits. If you want to be able to enter more complicated formulas or work with sets, matrices, and whatnot, then really the best option by far is

Mathematica. It has a learning curve like Everest, but you'll never need another calculator, ever. But it'll cost ya.

But if you can come up with a clearer definition for "word", this can probably easily be done in most any programming language.