68225963618 has 18 divisors (see below), whose sum is σ = 102984055083. Its totient is φ = 33899287380.

The previous prime is 68225963579. The next prime is 68225963627. The reversal of 68225963618 is 81636952286.

It can be written as a sum of positive squares in only one way, i.e., 34112981809 + 34112981809 = 184697^2 + 184697^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=184697.

It is a super-2 number, since 2×68225963618² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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, 70553771 + ... + 70554737.

Almost surely, 2^68225963618 is an apocalyptic number.

68225963618 is a deficient number, since it is larger than the sum of its proper divisors (34758091465).

68225963618 is an frugal number, since it uses more digits than its factorization.

68225963618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2318 (or 1160 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 56.

The spelling of 68225963618 in words is "sixty-eight billion, two hundred twenty-five million, nine hundred sixty-three thousand, six hundred eighteen".