no more library bullshit, real large integer comes in, legit string comes out (copied from somewhere)

itoa

char* IntegerToString(uint64_t value, char* result, int base) {
	// check that the base if valid
	if (base < 2 || base > 36) { *result = '\0'; return result; }
    
	char* ptr = result, *ptr1 = result, tmp_char;
	int tmp_value;
    
	do {
		tmp_value = value;
		value /= base;
		*ptr++ = "zyxwvutsrqponmlkjihgfedcba9876543210123456789abcdefghijklmnopqrstuvwxyz"[35 + (tmp_value - value * base)];
	} while (value);
    
	// Apply negative sign
	if (tmp_value < 0) *ptr++ = '-';
	*ptr-- = '\0';
	while (ptr1 < ptr) {
		tmp_char = *ptr;
		*ptr-- = *ptr1;
		*ptr1++ = tmp_char;
	}
	return result;
}