<P> The identity of the longest word in English depends upon the definition of what constitutes a word in the English language, as well as how length should be compared . In addition to words derived naturally from the language's roots (without any known intentional invention), English allows new words to be formed by coinage and construction; place names may be considered words; technical terms may be arbitrarily long . Length may be understood in terms of orthography and number of written letters, or (less commonly) phonology and the number of phonemes . </P> <Table> <Tr> <Th> Word </Th> <Th> Letters </Th> <Th> Characteristics </Th> <Th> Dispute </Th> </Tr> <Tr> <Td> Methionylthreonylthreonylglutaminylalanyl...isoleucine </Td> <Td> 189,819 </Td> <Td> Chemical name of titin, the largest known protein </Td> <Td> Technical; not in dictionary; disputed whether it is a word </Td> </Tr> <Tr> <Td> Methionylglutaminylarginyltyrosylglutamyl...serine </Td> <Td> 1,909 </Td> <Td> Longest published word </Td> <Td> Technical </Td> </Tr> <Tr> <Td> Lopadotemachoselachogaleokranioleipsano...pterygon </Td> <Td> 182 </Td> <Td> Longest word coined by a major author, the longest word ever to appear in literature </Td> <Td> Coined; not in dictionary; Ancient Greek transliteration </Td> </Tr> <Tr> <Td> Pneumonoultramicroscopicsilicovolcanoconiosis </Td> <Td> 45 </Td> <Td> Longest word in a major dictionary </Td> <Td> Technical; coined to be the longest word </Td> </Tr> <Tr> <Td> Supercalifragilisticexpialidocious </Td> <Td> 34 </Td> <Td> Made popular in the Mary Poppins film and musical </Td> <Td> Coined </Td> </Tr> <Tr> <Td> Pseudopseudohypoparathyroidism </Td> <Td> 30 </Td> <Td> Longest non-coined word in a major dictionary </Td> <Td> Technical </Td> </Tr> <Tr> <Td> Floccinaucinihilipilification </Td> <Td> 29 </Td> <Td> Longest unchallenged nontechnical word </Td> <Td> Coined </Td> </Tr> <Tr> <Td> Antidisestablishmentarianism </Td> <Td> 28 </Td> <Td> Longest non-coined and nontechnical word </Td> <Td> </Td> </Tr> <Tr> <Td> Honorificabilitudinitatibus </Td> <Td> 27 </Td> <Td> Longest word in Shakespeare's works; longest word in the English language featuring alternating consonants and vowels </Td> <Td> Latin </Td> </Tr> </Table> <Tr> <Th> Word </Th> <Th> Letters </Th> <Th> Characteristics </Th> <Th> Dispute </Th> </Tr>

How many letters are in the longest word ever
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