68316821078 has 32 divisors (see below), whose sum is σ = 124596973440. Its totient is φ = 27688210560.

The previous prime is 68316821077. The next prime is 68316821099. The reversal of 68316821078 is 87012861386.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68316821077) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4799876 + ... + 4814087.

It is an arithmetic number, because the mean of its divisors is an integer number (3893655420).

Almost surely, 2^68316821078 is an apocalyptic number.

68316821078 is a deficient number, since it is larger than the sum of its proper divisors (56280152362).

68316821078 is a wasteful number, since it uses less digits than its factorization.

68316821078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9614012.

The product of its (nonzero) digits is 774144, while the sum is 50.

The spelling of 68316821078 in words is "sixty-eight billion, three hundred sixteen million, eight hundred twenty-one thousand, seventy-eight".