68455728340 has 24 divisors (see below), whose sum is σ = 147642356232. Its totient is φ = 26642229120.

The previous prime is 68455728323. The next prime is 68455728361. The reversal of 68455728340 is 4382755486.

68455728340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 26671462596 + 41784265744 = 163314^2 + 204412^2 .

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46253131 + ... + 46254610.

It is an arithmetic number, because the mean of its divisors is an integer number (6151764843).

Almost surely, 2^68455728340 is an apocalyptic number.

It is an amenable number.

68455728340 is an abundant number, since it is smaller than the sum of its proper divisors (79186627892).

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

68455728340 is a wasteful number, since it uses less digits than its factorization.

68455728340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92507787 (or 92507785 counting only the distinct ones).

The product of its (nonzero) digits is 6451200, while the sum is 52.

The spelling of 68455728340 in words is "sixty-eight billion, four hundred fifty-five million, seven hundred twenty-eight thousand, three hundred forty".