68880028812 has 96 divisors (see below), whose sum is σ = 186183567360. Its totient is φ = 19412828160.

The previous prime is 68880028771. The next prime is 68880028843. The reversal of 68880028812 is 21882008886.

It is a happy number.

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 31 ways as a sum of consecutive naturals, for example, 3211468 + ... + 3232844.

It is an arithmetic number, because the mean of its divisors is an integer number (1939412160).

Almost surely, 2^68880028812 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 68880028812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93091783680).

68880028812 is an abundant number, since it is smaller than the sum of its proper divisors (117303538548).

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

68880028812 is a wasteful number, since it uses less digits than its factorization.

68880028812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21911 (or 21909 counting only the distinct ones).

The product of its (nonzero) digits is 786432, while the sum is 51.

The spelling of 68880028812 in words is "sixty-eight billion, eight hundred eighty million, twenty-eight thousand, eight hundred twelve".