171128205320 has 16 divisors (see below), whose sum is σ = 385038462060. Its totient is φ = 68451282112.

The previous prime is 171128205317. The next prime is 171128205329. The reversal of 171128205320 is 23502821171.

It can be written as a sum of positive squares in 2 ways, for example, as 169788498916 + 1339706404 = 412054^2 + 36602^2 .

It is not an unprimeable number, because it can be changed into a prime (171128205329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2139102527 + ... + 2139102606.

Almost surely, 2^171128205320 is an apocalyptic number.

171128205320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

171128205320 is an abundant number, since it is smaller than the sum of its proper divisors (213910256740).

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

171128205320 is a wasteful number, since it uses less digits than its factorization.

171128205320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4278205144 (or 4278205140 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 32.

The spelling of 171128205320 in words is "one hundred seventy-one billion, one hundred twenty-eight million, two hundred five thousand, three hundred twenty".