BigInteger: doubleValue()

import java.math.BigInteger;

/*
Here's Long.MAX_VALUE: 9223372036854775807
Here's a bigger number: 3419229223372036854775807
Here it is as a double: 3.419229223372037E24
 */
public class MainClass {
  public static void main(String[] args) {
    System.out.println("Here's Long.MAX_VALUE: " + Long.MAX_VALUE);
    BigInteger bInt = new BigInteger("3419229223372036854775807");
    System.out.println("Here's a bigger number: " + bInt);
    System.out.println("Here it is as a double: " + bInt.doubleValue());
  }

}