68204057328 has 60 divisors (see below), whose sum is σ = 208229058648. Its totient is φ = 20667895680.

The previous prime is 68204057323. The next prime is 68204057353. The reversal of 68204057328 is 82375040286.

It is a super-2 number, since 2×68204057328² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68204057323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21527475 + ... + 21530642.

Almost surely, 2^68204057328 is an apocalyptic number.

It is an amenable number.

68204057328 is an abundant number, since it is smaller than the sum of its proper divisors (140025001320).

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

68204057328 is a wasteful number, since it uses less digits than its factorization.

68204057328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43058142 (or 43058133 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 68204057328 in words is "sixty-eight billion, two hundred four million, fifty-seven thousand, three hundred twenty-eight".