68445028180 has 12 divisors (see below), whose sum is σ = 143734559220. Its totient is φ = 27378011264.

The previous prime is 68445028177. The next prime is 68445028207. The reversal of 68445028180 is 8182054486.

It can be written as a sum of positive squares in 2 ways, for example, as 40031206084 + 28413822096 = 200078^2 + 168564^2 .

It is a super-2 number, since 2×68445028180² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68445028180.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1711125685 + ... + 1711125724.

It is an arithmetic number, because the mean of its divisors is an integer number (11977879935).

Almost surely, 2^68445028180 is an apocalyptic number.

It is an amenable number.

68445028180 is an abundant number, since it is smaller than the sum of its proper divisors (75289531040).

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

68445028180 is a wasteful number, since it uses less digits than its factorization.

68445028180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3422251418 (or 3422251416 counting only the distinct ones).

The product of its (nonzero) digits is 491520, while the sum is 46.

The spelling of 68445028180 in words is "sixty-eight billion, four hundred forty-five million, twenty-eight thousand, one hundred eighty".