one billion = 10 letters
ten = 3 letters
three = 5 letters
five = 4 letters
four = 4 letters etc
fifty-two = 8 letters
eight = 5 letters
five = 4 letters
four = 4 letters etc.
one billlion two hundred forty-three million six hundred ninety-five thousand two hundred thirty-four = 86 letters
eighty-six = 9 letters
nine = 4 letters
four = 4 letters etc.