68535218928 has 180 divisors, whose sum is σ = 196322582120. Its totient is φ = 20586466560.

The previous prime is 68535218891. The next prime is 68535218981. The reversal of 68535218928 is 82981253586.

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 35 ways as a sum of consecutive naturals, for example, 299280318 + ... + 299280546.

Almost surely, 2^68535218928 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 68535218928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98161291060).

68535218928 is an abundant number, since it is smaller than the sum of its proper divisors (127787363192).

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

68535218928 is a wasteful number, since it uses less digits than its factorization.

68535218928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716 (or 472 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 57.

The spelling of 68535218928 in words is "sixty-eight billion, five hundred thirty-five million, two hundred eighteen thousand, nine hundred twenty-eight".