68489225618 has 18 divisors (see below), whose sum is σ = 112929031047. Its totient is φ = 31129615660.

The previous prime is 68489225611. The next prime is 68489225639. The reversal of 68489225618 is 81652298486.

It can be written as a sum of positive squares in only one way, i.e., 34244612809 + 34244612809 = 185053^2 + 185053^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=185053.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68489225611) 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 8 ways as a sum of consecutive naturals, for example, 4062755 + ... + 4079577.

Almost surely, 2^68489225618 is an apocalyptic number.

68489225618 is a deficient number, since it is larger than the sum of its proper divisors (44439805429).

68489225618 is an frugal number, since it uses more digits than its factorization.

68489225618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33670 (or 16836 counting only the distinct ones).

The product of its digits is 13271040, while the sum is 59.

The spelling of 68489225618 in words is "sixty-eight billion, four hundred eighty-nine million, two hundred twenty-five thousand, six hundred eighteen".