Write a Word Name for the Number in the Sentence $406,581,060$

Write a word name for the number in the sentence.
-The programmers were working with a graphics file of $406,581,060$ bytes.

A) Four hundred six thousand, five hundred eighty- one hundred, sixty
B) Four hundred six billion, five hundred eighty- one million, sixty
C) Four hundred six million, five hundred eighty- one thousand, sixty
D) Four hundred sixty million, five hundred eighty- one thousand, six hundred