171305453172 has 192 divisors, whose sum is σ = 473569689600. Its totient is φ = 47186302464.

The previous prime is 171305453167. The next prime is 171305453201. The reversal of 171305453172 is 271354503171.

It is a super-3 number, since 3×171305453172³ (a number of 35 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 171305453172.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 74706858 + ... + 74709150.

It is an arithmetic number, because the mean of its divisors is an integer number (2466508800).

Almost surely, 2^171305453172 is an apocalyptic number.

171305453172 is a gapful number since it is divisible by the number (12) 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 171305453172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236784844800).

171305453172 is an abundant number, since it is smaller than the sum of its proper divisors (302264236428).

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

171305453172 is a wasteful number, since it uses less digits than its factorization.

171305453172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2630 (or 2628 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 39.

The spelling of 171305453172 in words is "one hundred seventy-one billion, three hundred five million, four hundred fifty-three thousand, one hundred seventy-two".