68728522752 has 108 divisors (see below), whose sum is σ = 198603441855. Its totient is φ = 22897643520.

The previous prime is 68728522747. The next prime is 68728522763. The reversal of 68728522752 is 25722582786.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

68728522752 is a `hidden beast` number, since 68 + 7 + 2 + 8 + 522 + 7 + 52 = 666.

It can be written as a sum of positive squares in only one way, i.e., 34364261376 + 34364261376 = 185376^2 + 185376^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=185376.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 35591227 + ... + 35593157.

Almost surely, 2^68728522752 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 68728522752

68728522752 is an abundant number, since it is smaller than the sum of its proper divisors (129874919103).

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

68728522752 is an frugal number, since it uses more digits than its factorization.

68728522752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3890 (or 1936 counting only the distinct ones).

The product of its digits is 7526400, while the sum is 54.

The spelling of 68728522752 in words is "sixty-eight billion, seven hundred twenty-eight million, five hundred twenty-two thousand, seven hundred fifty-two".