68111778 has 32 divisors (see below), whose sum is σ = 161055360. Its totient is φ = 18789120.

The previous prime is 68111777. The next prime is 68111801. The reversal of 68111778 is 87711186.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68111773) 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, 26743 + ... + 29178.

It is an arithmetic number, because the mean of its divisors is an integer number (5032980).

Almost surely, 2^68111778 is an apocalyptic number.

68111778 is an abundant number, since it is smaller than the sum of its proper divisors (92943582).

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

68111778 is a wasteful number, since it uses less digits than its factorization.

68111778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55962.

The product of its digits is 18816, while the sum is 39.

The square root of 68111778 is about 8252.9860050772. The cubic root of 68111778 is about 408.3890344487.

The spelling of 68111778 in words is "sixty-eight million, one hundred eleven thousand, seven hundred seventy-eight".