Question 1098595
we have to put those numbers in order 
a=999999999999*999999999999
b=999999*999999*999999*999999
c=999999999999999999*999999
============
{{{a = (10^13 - 1)^2 = 10^26 - 2*10^13 - 1}}}
{{{b = (10^6 - 1)^4 = 10^24 - 4*10^18 + 6*10^12 - 4*10^6 + 1}}}
{{{c = (10^18 - 1)*(10^6 - 1) = 10^24 - 10^18 - 10^6 + 1}}}
---
{{{a = 10^26 - 2*10^13 - 1}}}
{{{b = 10^24 - 4*10^18 + 6*10^12 - 4*10^6 + 1}}}
{{{c = 10^24 - 10^18 - 10^6 + 1}}}
--------
a is largest
c is 2nd
b is smallest
================
Speaking of 10^26, the Sun generates ~4*10^26 watts.  For billions of years.
That's 400,000,000,000,000,000,000,000,000 watts.
---
The Earth receives at most 0.000000000000015% of that.
============
You never outgrow your need for useless facts.