EntityQ995700· pop 11· linked from 110 articlesfactorial number systemSign in to savemixed radix numeral system adapted to numbering permutations; represents a number as a×0! + b×1! + c×2! + ⋯Wikidata factsInstance ofmixed radix numerical systemvia Wikidata · CC0ConnectionsDonald KnuthEntitypositional notationEntitytally markEntitylexicographical orderEntityInternational Standard Book NumberEntityprime numberEntityintegerEntityancient historyEntityfunctionEntityrational numberEntityRoman numeralsEntityGeorg CantorEntitymathematical proofEntitybinary numeral systemEntitydecimalEntitynumeral systemEntityhexadecimalEntityfactorialEntitycombinatoricsEntitysequenceEntityCategoriesCombinatoricsFactorial and binomial topicsNon-standard positional numeral systems