nine billion nine hundred ninety nine million nine hundred ninety nine thousand five hundred twenty three Pronunciation in english(IPA) :
nʌɪn ˈbɪljən nʌɪn ˈhʌndrəd ˈnʌɪnti nʌɪn ˈmɪljən nʌɪn ˈhʌndrəd ˈnʌɪnti nʌɪn ˈθaʊz(ə)nd fʌɪv ˈhʌndrəd ˈtwɛnti θriː