Operating With Big Integer Values

 // Create via a string.
 BigInteger bi1 = new BigInteger(
   "1234567890123456890");
     
 // Create via a long.
 BigInteger bi2 = BigInteger.valueOf(123);
    
 bi1 = bi1.add(bi2);
 bi1 = bi1.multiply(bi2);
 bi1 = bi1.subtract(bi2);
 bi1 = bi1.divide(bi2);
 bi1 = bi1.negate();
 int exponent = 2;
 bi1 = bi1.pow(exponent);