68809856393982 has 256 divisors, whose sum is σ = 162323929497600. Its totient is φ = 19245156456960.

The previous prime is 68809856393977. The next prime is 68809856394101. The reversal of 68809856393982 is 28939365890886.

68809856393982 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 68809856393895 and 68809856393904.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 926333119 + ... + 926407397.

It is an arithmetic number, because the mean of its divisors is an integer number (634077849600).

Almost surely, 2^{68809856393982} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68809856393982, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81161964748800).

68809856393982 is an abundant number, since it is smaller than the sum of its proper divisors (93514073103618).

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

68809856393982 is a wasteful number, since it uses less digits than its factorization.

68809856393982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74591.

The product of its (nonzero) digits is 9674588160, while the sum is 84.

The spelling of 68809856393982 in words is "sixty-eight trillion, eight hundred nine billion, eight hundred fifty-six million, three hundred ninety-three thousand, nine hundred eighty-two".