171205828472 has 16 divisors (see below), whose sum is σ = 366869632560. Its totient is φ = 73373926464.

The previous prime is 171205828471. The next prime is 171205828483. The reversal of 171205828472 is 274828502171.

It is a super-2 number, since 2×171205828472² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171205828471) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1528623413 + ... + 1528623524.

It is an arithmetic number, because the mean of its divisors is an integer number (22929352035).

Almost surely, 2^171205828472 is an apocalyptic number.

It is an amenable number.

171205828472 is an abundant number, since it is smaller than the sum of its proper divisors (195663804088).

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

171205828472 is a wasteful number, since it uses less digits than its factorization.

171205828472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3057246950 (or 3057246946 counting only the distinct ones).

The product of its (nonzero) digits is 501760, while the sum is 47.

The spelling of 171205828472 in words is "one hundred seventy-one billion, two hundred five million, eight hundred twenty-eight thousand, four hundred seventy-two".