quatrilhão

Portuguese

**Portuguese numbers ^(edit)**
^{[a], [b]} ← 1,000,000,000 (10⁹)	^{[a], [b]} ← 10¹²	10¹⁵	10¹⁸ → ^{[a], [b]}	10²¹ → ^{[a], [b]}
Cardinal (Brazil): um quatrilhão, um quadrilhão Cardinal (Portugal): mil biliões Ordinal (Brazil): quatrilionésimo, quadrilionésimo Ordinal (Portugal): milésimo bilionésimo, milésimo de bilionésimo Fractional (Brazil): quatrilionésimo, quadrilionésimo, um quatrilhão avos, um quadrilhão avos Fractional (Portugal): milésimo bilionésimo, milésimo de bilionésimo, mil biliões avos
Portuguese Wikipedia article on 10¹⁵

Borrowed from French quatrillion.

quatrilhão m (plural quatrilhões)

(Brazil, cardinal number) quadrillion (10¹⁵)
Synonym: (Portugal) mil biliões
(Portugal, informal, cardinal number) septillion (10²⁴)
Synonyms: (Portugal, preferred in most circumstances) quatrilião, quadrilião; (Brazil) septilhão

Brazil (along with the US and UK) uses the short scale large-number naming system, while Portugal uses the long scale. The number 10¹⁵ (one quadrillion) is expressed in Brazilian Portuguese as um quatrilhão or um quadrilhão but in European and African Portuguese as mil biliões.[1]
In Portugal, um quatrilhão means "one septillion" (10²⁴) but is considered an informal spelling; quatrilião or quadrilião is preferred in most circumstances.[2]

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