168117155 has 8 divisors (see below), whose sum is σ = 201833952. Its totient is φ = 134431488.

The previous prime is 168117151. The next prime is 168117161. The reversal of 168117155 is 551711861.

It is a happy number.

It is a Cunningham number, because it is equal to 12966²-1.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 168117155 - 2² = 168117151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168117151) 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 7 ways as a sum of consecutive naturals, for example, 6482 + ... + 19448.

It is an arithmetic number, because the mean of its divisors is an integer number (25229244).

Almost surely, 2^168117155 is an apocalyptic number.

168117155 is a deficient number, since it is larger than the sum of its proper divisors (33716797).

168117155 is a wasteful number, since it uses less digits than its factorization.

168117155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15565.

The product of its digits is 8400, while the sum is 35.

The square root of 168117155 is about 12965.9999614376. Note that the first 4 decimals coincide. The cubic root of 168117155 is about 551.9130680770.

The spelling of 168117155 in words is "one hundred sixty-eight million, one hundred seventeen thousand, one hundred fifty-five".