Arduino for STM32

Hi, I have a question, about using 64-bit lenght data types. I'm using Arduino IDE (1.8.19), and if I put a declaration like this:
uint64 bigNumber=0;
it is compiling, but if I have:


unsigned int number1=0;
uint64 bigNumber=0;
uint64_t number2=0;
void setup() {
Serial.begin(9600);
}

void loop ...