68111111011 has 4 divisors (see below), whose sum is σ = 68118030792. Its totient is φ = 68104191232.

The previous prime is 68111110981. The next prime is 68111111021. The reversal of 68111111011 is 11011111186.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11011111186 = 2 ⋅5505555593.

It is a cyclic number.

It is not a de Polignac number, because 68111111011 - 2²⁹ = 67574240099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68111111021) 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 3 ways as a sum of consecutive naturals, for example, 3445105 + ... + 3464818.

It is an arithmetic number, because the mean of its divisors is an integer number (17029507698).

Almost surely, 2^68111111011 is an apocalyptic number.

68111111011 is a deficient number, since it is larger than the sum of its proper divisors (6919781).

68111111011 is an equidigital number, since it uses as much as digits as its factorization.

68111111011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6919780.

The product of its (nonzero) digits is 48, while the sum is 22.

Adding to 68111111011 its reverse (11011111186), we get a palindrome (79122222197).

The spelling of 68111111011 in words is "sixty-eight billion, one hundred eleven million, one hundred eleven thousand, eleven".