68821128648 has 96 divisors (see below), whose sum is σ = 197603477760. Its totient is φ = 21600328320.

The previous prime is 68821128601. The next prime is 68821128653. The reversal of 68821128648 is 84682112886.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 68821128594 and 68821128603.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 334090 + ... + 499257.

It is an arithmetic number, because the mean of its divisors is an integer number (2058369560).

Almost surely, 2^68821128648 is an apocalyptic number.

It is an amenable number.

68821128648 is an abundant number, since it is smaller than the sum of its proper divisors (128782349112).

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

68821128648 is a wasteful number, since it uses less digits than its factorization.

68821128648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833427 (or 833420 counting only the distinct ones).

The product of its digits is 2359296, while the sum is 54.

The spelling of 68821128648 in words is "sixty-eight billion, eight hundred twenty-one million, one hundred twenty-eight thousand, six hundred forty-eight".