68112161 has 4 divisors (see below), whose sum is σ = 73351572. Its totient is φ = 62872752.

The previous prime is 68112127. The next prime is 68112179. The reversal of 68112161 is 16121186.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16121186 = 2 ⋅8060593.

It can be written as a sum of positive squares in 2 ways, for example, as 2825761 + 65286400 = 1681^2 + 8080^2 .

It is a cyclic number.

It is not a de Polignac number, because 68112161 - 2¹⁰ = 68111137 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 68112161.

It is not an unprimeable number, because it can be changed into a prime (68112181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2619686 + ... + 2619711.

It is an arithmetic number, because the mean of its divisors is an integer number (18337893).

Almost surely, 2^68112161 is an apocalyptic number.

It is an amenable number.

68112161 is a deficient number, since it is larger than the sum of its proper divisors (5239411).

68112161 is a wasteful number, since it uses less digits than its factorization.

68112161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5239410.

The product of its digits is 576, while the sum is 26.

The square root of 68112161 is about 8253.0092087674. The cubic root of 68112161 is about 408.3897999194.

The spelling of 68112161 in words is "sixty-eight million, one hundred twelve thousand, one hundred sixty-one".