68353561797920 has 192 divisors, whose sum is σ = 186296877801216. Its totient is φ = 23214308536320.

The previous prime is 68353561797907. The next prime is 68353561797943. The reversal of 68353561797920 is 2979716535386.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1766542094 + ... + 1766580786.

It is an arithmetic number, because the mean of its divisors is an integer number (970296238548).

Almost surely, 2^{68353561797920} 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 68353561797920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93148438900608).

68353561797920 is an abundant number, since it is smaller than the sum of its proper divisors (117943316003296).

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

68353561797920 is a wasteful number, since it uses less digits than its factorization.

68353561797920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53563 (or 53555 counting only the distinct ones).

The product of its (nonzero) digits is 514382400, while the sum is 71.

The spelling of 68353561797920 in words is "sixty-eight trillion, three hundred fifty-three billion, five hundred sixty-one million, seven hundred ninety-seven thousand, nine hundred twenty".