68341993808640 has 1944 divisors, whose sum is σ = 250562578999824. Its totient is φ = 15867784396800.

The previous prime is 68341993808629. The next prime is 68341993808651. The reversal of 68341993808640 is 4680839914386.

It is an interprime number because it is at equal distance from previous prime (68341993808629) and next prime (68341993808651).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 1120360554210 + ... + 1120360554270.

Almost surely, 2^{68341993808640} is an apocalyptic number.

68341993808640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68341993808640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125281289499912).

68341993808640 is an abundant number, since it is smaller than the sum of its proper divisors (182220585191184).

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

68341993808640 is a wasteful number, since it uses less digits than its factorization.

68341993808640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 214990848, while the sum is 69.

The spelling of 68341993808640 in words is "sixty-eight trillion, three hundred forty-one billion, nine hundred ninety-three million, eight hundred eight thousand, six hundred forty".