68968579016 has 8 divisors (see below), whose sum is σ = 129316085670. Its totient is φ = 34484289504.

The previous prime is 68968579007. The next prime is 68968579019. The reversal of 68968579016 is 61097586986.

It can be written as a sum of positive squares in only one way, i.e., 62415028900 + 6553550116 = 249830^2 + 80954^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (68968579019) 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 as a sum of consecutive naturals, namely, 4310536181 + ... + 4310536196.

Almost surely, 2^68968579016 is an apocalyptic number.

It is an amenable number.

68968579016 is a deficient number, since it is larger than the sum of its proper divisors (60347506654).

68968579016 is a wasteful number, since it uses less digits than its factorization.

68968579016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8621072383 (or 8621072379 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 65.

The spelling of 68968579016 in words is "sixty-eight billion, nine hundred sixty-eight million, five hundred seventy-nine thousand, sixteen".