15,931,611,376 fifteen billion, nine hundred and thirty-one million, six hundred and eleven thousand, three hundred and seventy-six 第一个逗号--billion 十亿 第二个逗号--million 百万 第三个逗号--thousands 千
15,931,611,376 fifteen billion nine hundred and thirty one million six hundred and eleven thousand three hundred and seventy six. 楼上的那位一开头就错了。 希望我的答案可以帮到你。 祝好。