68178171 has 4 divisors (see below), whose sum is σ = 90904232. Its totient is φ = 45452112.

The previous prime is 68178169. The next prime is 68178179. The reversal of 68178171 is 17187186.

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

It is not a de Polignac number, because 68178171 - 2¹ = 68178169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68178179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11363026 + ... + 11363031.

It is an arithmetic number, because the mean of its divisors is an integer number (22726058).

Almost surely, 2^68178171 is an apocalyptic number.

68178171 is a deficient number, since it is larger than the sum of its proper divisors (22726061).

68178171 is a wasteful number, since it uses less digits than its factorization.

68178171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22726060.

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

The square root of 68178171 is about 8257.0073876678. The cubic root of 68178171 is about 408.5216858478.

The spelling of 68178171 in words is "sixty-eight million, one hundred seventy-eight thousand, one hundred seventy-one".