68209778928 has 80 divisors (see below), whose sum is σ = 176991100416. Its totient is φ = 22635813120.

The previous prime is 68209778893. The next prime is 68209778951. The reversal of 68209778928 is 82987790286.

It is a happy number.

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 in 15 ways as a sum of consecutive naturals, for example, 14880925 + ... + 14885507.

Almost surely, 2^68209778928 is an apocalyptic number.

It is an amenable number.

68209778928 is an abundant number, since it is smaller than the sum of its proper divisors (108781321488).

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

68209778928 is a wasteful number, since it uses less digits than its factorization.

68209778928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5902 (or 5896 counting only the distinct ones).

The product of its (nonzero) digits is 48771072, while the sum is 66.

The spelling of 68209778928 in words is "sixty-eight billion, two hundred nine million, seven hundred seventy-eight thousand, nine hundred twenty-eight".