Число прописью is a free Android application developed by HelloWorldError that converts any given number into words in Russian language. This app is a handy tool for anyone who needs to write a check, invoice, or any other document that requires the amount in words.

The app supports numbers up to 3003 digits for the short scale and up to 6000 digits for the long scale. It also allows users to choose the gender and case of the words, making it easier to use in different contexts. For long numbers, users can enter the exponential notation to quickly get the name of the number in words.

Overall, Число прописью is a useful tool for anyone who needs to convert numbers to words in Russian language. It is easy to use, accurate, and free to download from the Google Play Store.