171116555 has 4 divisors (see below), whose sum is σ = 205339872. Its totient is φ = 136893240.

The previous prime is 171116551. The next prime is 171116557. The reversal of 171116555 is 555611171.

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

It is not a de Polignac number, because 171116555 - 2² = 171116551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171116551) 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, 17111651 + ... + 17111660.

It is an arithmetic number, because the mean of its divisors is an integer number (51334968).

Almost surely, 2^171116555 is an apocalyptic number.

171116555 is a deficient number, since it is larger than the sum of its proper divisors (34223317).

171116555 is an equidigital number, since it uses as much as digits as its factorization.

171116555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34223316.

The product of its digits is 5250, while the sum is 32.

The square root of 171116555 is about 13081.1526632786. The cubic root of 171116555 is about 555.1759905041.

The spelling of 171116555 in words is "one hundred seventy-one million, one hundred sixteen thousand, five hundred fifty-five".