68568161 has 4 divisors (see below), whose sum is σ = 69028500. Its totient is φ = 68107824.

The previous prime is 68568133. The next prime is 68568163. The reversal of 68568161 is 16186586.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29430625 + 39137536 = 5425^2 + 6256^2 .

It is a cyclic number.

It is not a de Polignac number, because 68568161 - 2²² = 64373857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68568163) 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, 229946 + ... + 230243.

It is an arithmetic number, because the mean of its divisors is an integer number (17257125).

Almost surely, 2^68568161 is an apocalyptic number.

It is an amenable number.

68568161 is a deficient number, since it is larger than the sum of its proper divisors (460339).

68568161 is a wasteful number, since it uses less digits than its factorization.

68568161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460338.

The product of its digits is 69120, while the sum is 41.

The square root of 68568161 is about 8280.5894113885. The cubic root of 68568161 is about 409.2991417120.

The spelling of 68568161 in words is "sixty-eight million, five hundred sixty-eight thousand, one hundred sixty-one".