68643806448 has 80 divisors (see below), whose sum is σ = 204669328896. Its totient is φ = 19418323200.

The previous prime is 68643806359. The next prime is 68643806453. The reversal of 68643806448 is 84460834686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 977436 + ... + 1045307.

Almost surely, 2^68643806448 is an apocalyptic number.

It is an amenable number.

68643806448 is an abundant number, since it is smaller than the sum of its proper divisors (136025522448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68643806448 is a wasteful number, since it uses less digits than its factorization.

68643806448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2022862 (or 2022856 counting only the distinct ones).

The product of its (nonzero) digits is 21233664, while the sum is 57.

The spelling of 68643806448 in words is "sixty-eight billion, six hundred forty-three million, eight hundred six thousand, four hundred forty-eight".