68979968178 has 16 divisors (see below), whose sum is σ = 150501748896. Its totient is φ = 20903020640.

The previous prime is 68979968143. The next prime is 68979968191. The reversal of 68979968178 is 87186997986.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 522575451 + ... + 522575582.

It is an arithmetic number, because the mean of its divisors is an integer number (9406359306).

Almost surely, 2^68979968178 is an apocalyptic number.

68979968178 is an abundant number, since it is smaller than the sum of its proper divisors (81521780718).

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

68979968178 is a wasteful number, since it uses less digits than its factorization.

68979968178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045151049.

The product of its digits is 658409472, while the sum is 78.

The spelling of 68979968178 in words is "sixty-eight billion, nine hundred seventy-nine million, nine hundred sixty-eight thousand, one hundred seventy-eight".