68643767208 has 32 divisors (see below), whose sum is σ = 172960680960. Its totient is φ = 22701087360.

The previous prime is 68643767161. The next prime is 68643767209. The reversal of 68643767208 is 80276734686.

It is a super-2 number, since 2×68643767208² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68643767209) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 11257413 + ... + 11263508.

It is an arithmetic number, because the mean of its divisors is an integer number (5405021280).

Almost surely, 2^68643767208 is an apocalyptic number.

It is an amenable number.

68643767208 is an abundant number, since it is smaller than the sum of its proper divisors (104316913752).

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

68643767208 is a wasteful number, since it uses less digits than its factorization.

68643767208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22521057 (or 22521053 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 57.

The spelling of 68643767208 in words is "sixty-eight billion, six hundred forty-three million, seven hundred sixty-seven thousand, two hundred eight".