nine billion nine hundred ninety nine million nine hundred ninety nine thousand four hundred seventy eight Pronunciation in english(IPA) :
nʌɪn ˈbɪljən nʌɪn ˈhʌndrəd ˈnʌɪnti nʌɪn ˈmɪljən nʌɪn ˈhʌndrəd ˈnʌɪnti nʌɪn ˈθaʊz(ə)nd fɔː ˈhʌndrəd ˈsɛv(ə)nti eɪt