Función BigIntegerMath isPowerOfTwo() | guayaba | Java

El método isPowerOfTwo(BigInteger x) de la clase BigIntegerMath de Guava devuelve verdadero si x representa una potencia de dos. 
Sintaxis: 
 

public static boolean isPowerOfTwo(BigInteger x)

Parámetros: este método toma el número BigInteger x como parámetro que se debe verificar.
Valor devuelto: este método devuelve verdadero si x es una potencia de dos.
Los siguientes ejemplos ilustran el método BigIntegerMath.isPowerOfTwo():
Ejemplo 1:
 

// Java code to show implementation of
// isPowerOfTwo(BigInteger x) method of
// Guava's BigIntegerMath class
 
import java.math.*;
import com.google.common.math.BigIntegerMath;
 
class GFG {
 
    // Driver code
    public static void main(String args[])
    {
        BigInteger a1 = BigInteger.valueOf(63);
 
        // Using isPowerOfTwo(BigInteger x) method
        // of Guava's BigIntegerMath class
        if (BigIntegerMath.isPowerOfTwo(a1))
            System.out.println(a1 + " is power of 2");
        else
            System.out.println(a1 + " is not power of 2");
 
        BigInteger a2 = BigInteger.valueOf(1024);
 
        // Using isPowerOfTwo(BigInteger x) method
        // of Guava's BigIntegerMath class
        if (BigIntegerMath.isPowerOfTwo(a2))
            System.out.println(a2 + " is power of 2");
        else
            System.out.println(a2 + " is not power of 2");
    }
}

63 is not power of 2
1024 is power of 2

Ejemplo 2:
 

// Java code to show implementation of
// isPowerOfTwo(BigInteger x) method of
// Guava's BigIntegerMath class
 
import java.math.*;
import com.google.common.math.BigIntegerMath;
 
class GFG {
 
    // Driver code
    public static void main(String args[])
    {
        BigInteger a1 = BigInteger.valueOf(1);
 
        // Using isPowerOfTwo(BigInteger x) method
        // of Guava's BigIntegerMath class
        if (BigIntegerMath.isPowerOfTwo(a1))
            System.out.println(a1 + " is power of 2");
        else
            System.out.println(a1 + " is not power of 2");
 
        BigInteger a2 = BigInteger.valueOf(567);
 
        // Using isPowerOfTwo(BigInteger x) method
        // of Guava's BigIntegerMath class
        if (BigIntegerMath.isPowerOfTwo(a2))
            System.out.println(a2 + " is power of 2");
        else
            System.out.println(a2 + " is not power of 2");
    }
}

1 is power of 2
567 is not power of 2

Referencia: https://google.github.io/guava/releases/21.0/api/docs/com/google/common/math/BigIntegerMath.html#isPowerOfTwo-java.math.BigInteger-