68608880778 has 16 divisors (see below), whose sum is σ = 137286019296. Its totient is φ = 22858250640.

The previous prime is 68608880773. The next prime is 68608880783. The reversal of 68608880778 is 87708880686.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (68608880773) and next prime (68608880783).

It is not an unprimeable number, because it can be changed into a prime (68608880771) 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 7 ways as a sum of consecutive naturals, for example, 2831001 + ... + 2855132.

It is an arithmetic number, because the mean of its divisors is an integer number (8580376206).

Almost surely, 2^68608880778 is an apocalyptic number.

68608880778 is an abundant number, since it is smaller than the sum of its proper divisors (68677138518).

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

68608880778 is a wasteful number, since it uses less digits than its factorization.

68608880778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5688149.

The product of its (nonzero) digits is 57802752, while the sum is 66.

The spelling of 68608880778 in words is "sixty-eight billion, six hundred eight million, eight hundred eighty thousand, seven hundred seventy-eight".