68628243728 has 60 divisors (see below), whose sum is σ = 146229484464. Its totient is φ = 31178558400.

The previous prime is 68628243707. The next prime is 68628243731. The reversal of 68628243728 is 82734282686.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4256963 + ... + 4273053.

Almost surely, 2^68628243728 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 68628243728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73114742232).

68628243728 is an abundant number, since it is smaller than the sum of its proper divisors (77601240736).

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

68628243728 is a wasteful number, since it uses less digits than its factorization.

68628243728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18324 (or 18307 counting only the distinct ones).

The product of its digits is 12386304, while the sum is 56.

The spelling of 68628243728 in words is "sixty-eight billion, six hundred twenty-eight million, two hundred forty-three thousand, seven hundred twenty-eight".