one billion seven hundred ninety nine million nine hundred ninety nine thousand one hundred fifty seven Pronunciation in english(IPA) :
wʌn ˈbɪljən ˈsɛv(ə)n ˈhʌndrəd ˈnʌɪnti nʌɪn ˈmɪljən nʌɪn ˈhʌndrəd ˈnʌɪnti nʌɪn ˈθaʊz(ə)nd wʌn ˈhʌndrəd ˈfɪfti ˈsɛv(ə)n