171811385725340 has 48 divisors (see below), whose sum is σ = 379884517975200. Its totient is φ = 65091884746752.

The previous prime is 171811385725247. The next prime is 171811385725393. The reversal of 171811385725340 is 43527583118171.

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 15 ways as a sum of consecutive naturals, for example, 52534745 + ... + 55709264.

It is an arithmetic number, because the mean of its divisors is an integer number (7914260791150).

Almost surely, 2^{171811385725340} is an apocalyptic number.

171811385725340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

171811385725340 is an abundant number, since it is smaller than the sum of its proper divisors (208073132249860).

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

171811385725340 is a wasteful number, since it uses less digits than its factorization.

171811385725340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108248214 (or 108248212 counting only the distinct ones).

The product of its (nonzero) digits is 5644800, while the sum is 56.

The spelling of 171811385725340 in words is "one hundred seventy-one trillion, eight hundred eleven billion, three hundred eighty-five million, seven hundred twenty-five thousand, three hundred forty".