171988208741312 has 56 divisors (see below), whose sum is σ = 356178895927296. Its totient is φ = 82243418957568.

The previous prime is 171988208741311. The next prime is 171988208741339. The reversal of 171988208741312 is 213147802889171.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171988208741311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1870193 + ... + 18640655.

Almost surely, 2^{171988208741312} is an apocalyptic number.

It is an amenable number.

171988208741312 is an abundant number, since it is smaller than the sum of its proper divisors (184190687185984).

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

171988208741312 is a wasteful number, since it uses less digits than its factorization.

171988208741312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16777465 (or 16777455 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 62.

The spelling of 171988208741312 in words is "one hundred seventy-one trillion, nine hundred eighty-eight billion, two hundred eight million, seven hundred forty-one thousand, three hundred twelve".