16648239668 has 6 divisors (see below), whose sum is σ = 29134419426. Its totient is φ = 8324119832.

The previous prime is 16648239653. The next prime is 16648239677. The reversal of 16648239668 is 86693284661.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16648224784 + 14884 = 129028^2 + 122^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2081029955 + ... + 2081029962.

It is an arithmetic number, because the mean of its divisors is an integer number (4855736571).

Almost surely, 2^16648239668 is an apocalyptic number.

It is an amenable number.

16648239668 is a deficient number, since it is larger than the sum of its proper divisors (12486179758).

16648239668 is a wasteful number, since it uses less digits than its factorization.

16648239668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4162059921 (or 4162059919 counting only the distinct ones).

The product of its digits is 17915904, while the sum is 59.

The spelling of 16648239668 in words is "sixteen billion, six hundred forty-eight million, two hundred thirty-nine thousand, six hundred sixty-eight".