That's the network minimum difficulty (3.51T) and the actual difficulty found (3.85T)
"3.51 T" is shorthand for 3,511,060,552,899
"T"= trillion
AKA Peta hashes?
No, hash is hash and network diff is network diff; one will never be "aka" the other (that would be like saying "a cat is aka a dog").
If:
A is for
Apple
and
A is for
Alligator
Is an apple "aka" an alligator?