68543826868 has 18 divisors (see below), whose sum is σ = 131847734018. Its totient is φ = 31156284720.

The previous prime is 68543826847. The next prime is 68543826877. The reversal of 68543826868 is 86862834586.

It can be written as a sum of positive squares in only one way, i.e., 36205717284 + 32338109584 = 190278^2 + 179828^2 .

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 5 ways as a sum of consecutive naturals, for example, 70809255 + ... + 70810222.

Almost surely, 2^68543826868 is an apocalyptic number.

It is an amenable number.

68543826868 is a deficient number, since it is larger than the sum of its proper divisors (63303907150).

68543826868 is a wasteful number, since it uses less digits than its factorization.

68543826868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141619503 (or 141619490 counting only the distinct ones).

The product of its digits is 106168320, while the sum is 64.

The spelling of 68543826868 in words is "sixty-eight billion, five hundred forty-three million, eight hundred twenty-six thousand, eight hundred sixty-eight".