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Re:%*$*#&#* Windows 7 Calculator by jug on Friday December 25, 2015 @12:56PM (#10791787)
I can recommend SpeedCrunch. Free and open source, comes in an installer free (USB/portable) version, and as for checking the value of the number in the topic, simply type hex(17281580835365214242). It supports Windows as well as OS X.

https://bitbucket.org/heldercorreia/speedcrunch

Re:%*$*#&#* Windows 7 Calculator by frik on Friday December 25, 2015 @02:21PM (#10792045)
SpeedCrunch is great too, it was originally inspired by the WinXP PowerCalc - probably the best calculator from Microsoft: http://dan.hersam.com/2010/11/10/powercalc-in-windows-7/ (SpeedCrunch still lacks the graph rendering part, though has other features and improvements)
Re:%*$*#&#* Windows 7 Calculator by RadioactiveMan on Friday December 25, 2015 @01:02PM (#10791810)
I adore SpeedCrunch. I don't have fancy large number requirements but I love the interface. It works on Linux too, though I think it's an old version in the Ubuntu repository so you might prefer to download the source instead.
Re:%*$*#&#* Windows 7 Calculator by maguirre on Friday December 25, 2015 @02:20PM (#10792042)
Absolutely! love this calculator miles ahead of anything Windows has ever offered