68486830544 has 30 divisors (see below), whose sum is σ = 145852897890. Its totient is φ = 31130376640.

The previous prime is 68486830543. The next prime is 68486830591. The reversal of 68486830544 is 44503868486.

It can be written as a sum of positive squares in only one way, i.e., 65689690000 + 2797140544 = 256300^2 + 52888^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 68486830544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68486830543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17685779 + ... + 17689650.

It is an arithmetic number, because the mean of its divisors is an integer number (4861763263).

Almost surely, 2^68486830544 is an apocalyptic number.

It is an amenable number.

68486830544 is an abundant number, since it is smaller than the sum of its proper divisors (77366067346).

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

68486830544 is a wasteful number, since it uses less digits than its factorization.

68486830544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35375459 (or 35375442 counting only the distinct ones).

The product of its (nonzero) digits is 17694720, while the sum is 56.

The spelling of 68486830544 in words is "sixty-eight billion, four hundred eighty-six million, eight hundred thirty thousand, five hundred forty-four".