What is the significance of A-7713 i the book Night?

A-7713 was the identification number tattooed on Elie Wiesel's arm when he arrived at Auschwitz concentration camp. This number became a symbol of the dehumanization and loss of identity experienced by prisoners in the Holocaust. It represents the brutality and inhumanity of the Nazis and the struggle for survival and remembrance of those who were subjected to the horrors of the Holocaust.