docs: def __to_text(self, number, indice = 0, sing=False):
          """Convierte un numero a texto, recursivamente"""
  
          number = int(number)
          exp = self.exponentes[indice]
          indice += 1
          divisor = 10 ** exp
  
          if exp == 3:
              func = self.__numero_tres_cifras
          else:
              func = self.__to_text
          
          if divisor < number:
              division = number // divisor
              resto = number % divisor
          
              if resto:
                  der = func(resto, indice, sing)
              else:
                  der = False
  
              if exp == 3 and division == 1: #1000
                  return "%s %s" % (exponentes_plural[exp], der)
              else:
                  izq = func(division, indice, True)
                  if der:
                      if division == 1:
                          return "%s %s" % (exponentes_singular[exp], der)
                      else:
                          return "%s %s %s" % (izq, exponentes_plural[exp], der)
                  else:
                      if division == 1:
                          return exponentes_singular[exp]
                      else:
                          return "%s %s" % (izq, exponentes_plural[exp])
                          
          elif divisor == int(number):
              if exp == 3:
                  return exponentes_plural[exp]
              else:
                  return exponentes_singular[exp]
          else:
              return func(number, indice, sing)