68078159 has 16 divisors (see below), whose sum is σ = 74131200. Its totient is φ = 62306496.

The previous prime is 68078123. The next prime is 68078161. The reversal of 68078159 is 95187086.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68078159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68078359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83747 + ... + 84555.

It is an arithmetic number, because the mean of its divisors is an integer number (4633200).

Almost surely, 2^68078159 is an apocalyptic number.

68078159 is a deficient number, since it is larger than the sum of its proper divisors (6053041).

68078159 is a wasteful number, since it uses less digits than its factorization.

68078159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 68078159 is about 8250.9489757239. The cubic root of 68078159 is about 408.3218317275.

The spelling of 68078159 in words is "sixty-eight million, seventy-eight thousand, one hundred fifty-nine".