208515407668 has 12 divisors (see below), whose sum is σ = 371086742880. Its totient is φ = 102490623992.

The previous prime is 208515407657. The next prime is 208515407669. The reversal of 208515407668 is 866704515802.

It is a happy number.

208515407668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208515407669) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 441769696 + ... + 441770167.

It is an arithmetic number, because the mean of its divisors is an integer number (30923895240).

Almost surely, 2^208515407668 is an apocalyptic number.

It is an amenable number.

208515407668 is a deficient number, since it is larger than the sum of its proper divisors (162571335212).

208515407668 is a wasteful number, since it uses less digits than its factorization.

208515407668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883539926 (or 883539924 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 52.

The spelling of 208515407668 in words is "two hundred eight billion, five hundred fifteen million, four hundred seven thousand, six hundred sixty-eight".