171099649908 has 144 divisors (see below), whose sum is σ = 497029478400. Its totient is φ = 49082276160.

The previous prime is 171099649891. The next prime is 171099649921. The reversal of 171099649908 is 809946990171.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10819135 + ... + 10834937.

It is an arithmetic number, because the mean of its divisors is an integer number (3451593600).

Almost surely, 2^171099649908 is an apocalyptic number.

171099649908 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 171099649908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248514739200).

171099649908 is an abundant number, since it is smaller than the sum of its proper divisors (325929828492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

171099649908 is a wasteful number, since it uses less digits than its factorization.

171099649908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17282 (or 17277 counting only the distinct ones).

The product of its (nonzero) digits is 8817984, while the sum is 63.

The spelling of 171099649908 in words is "one hundred seventy-one billion, ninety-nine million, six hundred forty-nine thousand, nine hundred eight".