171325215660 has 144 divisors (see below), whose sum is σ = 517239813888. Its totient is φ = 42290328960.

The previous prime is 171325215643. The next prime is 171325215701. The reversal of 171325215660 is 66512523171.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1261587 + ... + 1390773.

It is an arithmetic number, because the mean of its divisors is an integer number (3591943152).

Almost surely, 2^171325215660 is an apocalyptic number.

171325215660 is a gapful number since it is divisible by the number (10) 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 171325215660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258619906944).

171325215660 is an abundant number, since it is smaller than the sum of its proper divisors (345914598228).

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

171325215660 is a wasteful number, since it uses less digits than its factorization.

171325215660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129284 (or 129251 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 39.

The spelling of 171325215660 in words is "one hundred seventy-one billion, three hundred twenty-five million, two hundred fifteen thousand, six hundred sixty".