אֵ֛לֶּה מִשְׁפְּחֹ֥ת יִשָּׂשכָ֖ר לִפְקֻדֵיהֶ֑ם אַרְבָּעָ֧ה וְשִׁשִּׁ֛ים אֶ֖לֶף וּשְׁלֹ֥שׁ מֵאֽוֹת׃ (ס)
These are the families of Issachar according to those that were numbered of them, threescore and four thousand and three hundred.
Read kabbalistic (mystical) interpretation of Numbers 26:25: and classical mystical sources.