gistfile1.txt

const numberWords = [
  '',
  'one',
  'two',
  'three',
  'four',
  'five',
  'six',
  'seven',
  'eight',
  'nine',
  'ten',
  'eleven',
  'twelve',
  'thirteen',
  'fourteen',
  'fifteen',
  'sixteen',
  'seventeen',
  'eighteen',
  'nineteen',
  'twenty'
];
numberWords[30] = 'thirty';
numberWords[40] = 'fourty';
numberWords[50] = 'fifty';
numberWords[60] = 'sixty';
numberWords[70] = 'seventy';
numberWords[80] = 'eighty';
numberWords[90] = 'ninety';

const suffix = {
  0: '',
  1: ' thousand ',
  2: ' million ',
  3: ' billion ',
  4: ' trillion ',
  5: ' quadrillion ',
  6: ' quintillion ',
  7: ' sextillion ',
  8: ' septillion '
}
const subNumberToHuman = number => {
  if (!number) {
    return '';
  }
  let result = '';
  const firstTwoDigits = number%100;
  if (numberWords[number%100]) {
    result = `${numberWords[number%100]}`;
  } else {
    const firstDigit = number%10;
    const secondDigit = Math.floor(number%100/10) * 10
    result = numberWords[firstDigit];
    if (secondDigit) {
      result = `${numberWords[secondDigit]} ${result}`
    }
  }
  const thirdDigit = Math.floor(number/100);
  let tmpRes = '';
  if (thirdDigit) {
    tmpRes = `${numberWords[thirdDigit]} hundred`;
  }
  result = `${tmpRes}${result}`;
  return result;
};

const numberToHuman = number => {
  let result = '';
  let count = 0;
  let remainder = number;
  while (remainder > 0) {
    const subNumber = subNumberToHuman(remainder % 1000);
    if (subNumber) {
      result = `${subNumber}${suffix[count]}${result}`;
    }
    remainder = Math.floor(remainder / 1000);
    count++;
  }
  return result;
};