68155111 has 4 divisors (see below), whose sum is σ = 68171832. Its totient is φ = 68138392.

The previous prime is 68155097. The next prime is 68155121. The reversal of 68155111 is 11155186.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 68155111 - 2⁹ = 68154599 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68155111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68155121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2205 + ... + 11881.

It is an arithmetic number, because the mean of its divisors is an integer number (17042958).

Almost surely, 2^68155111 is an apocalyptic number.

68155111 is a deficient number, since it is larger than the sum of its proper divisors (16721).

68155111 is an equidigital number, since it uses as much as digits as its factorization.

68155111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16720.

The product of its digits is 1200, while the sum is 28.

The square root of 68155111 is about 8255.6108798804. The cubic root of 68155111 is about 408.4756223633.

The spelling of 68155111 in words is "sixty-eight million, one hundred fifty-five thousand, one hundred eleven".