171111449111 has 4 divisors (see below), whose sum is σ = 171280365672. Its totient is φ = 170942532552.

The previous prime is 171111449101. The next prime is 171111449123. The reversal of 171111449111 is 111944111171.

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

It is a cyclic number.

It is not a de Polignac number, because 171111449111 - 2²² = 171107254807 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 (171111449101) 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, 84456761 + ... + 84458786.

It is an arithmetic number, because the mean of its divisors is an integer number (42820091418).

Almost surely, 2^171111449111 is an apocalyptic number.

171111449111 is a deficient number, since it is larger than the sum of its proper divisors (168916561).

171111449111 is a wasteful number, since it uses less digits than its factorization.

171111449111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168916560.

The product of its digits is 1008, while the sum is 32.

The spelling of 171111449111 in words is "one hundred seventy-one billion, one hundred eleven million, four hundred forty-nine thousand, one hundred eleven".