68091383808 has 624 divisors, whose sum is σ = 241861226880. Its totient is φ = 18728091648.

The previous prime is 68091383783. The next prime is 68091383851. The reversal of 68091383808 is 80838319086.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 202051416 + ... + 202051752.

It is an arithmetic number, because the mean of its divisors is an integer number (387598120).

Almost surely, 2^68091383808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68091383808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120930613440).

68091383808 is an abundant number, since it is smaller than the sum of its proper divisors (173769843072).

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

68091383808 is an equidigital number, since it uses as much as digits as its factorization.

68091383808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412 (or 378 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The spelling of 68091383808 in words is "sixty-eight billion, ninety-one million, three hundred eighty-three thousand, eight hundred eight".