171321040828 has 144 divisors (see below), whose sum is σ = 384912912384. Its totient is φ = 66221729280.

The previous prime is 171321040823. The next prime is 171321040831. The reversal of 171321040828 is 828040123171.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171321040823) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10631025 + ... + 10647127.

It is an arithmetic number, because the mean of its divisors is an integer number (2673006336).

Almost surely, 2^171321040828 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 171321040828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192456456192).

171321040828 is an abundant number, since it is smaller than the sum of its proper divisors (213591871556).

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

171321040828 is a wasteful number, since it uses less digits than its factorization.

171321040828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16272 (or 16263 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 37.

Adding to 171321040828 its reverse (828040123171), we get a palindrome (999361163999).

The spelling of 171321040828 in words is "one hundred seventy-one billion, three hundred twenty-one million, forty thousand, eight hundred twenty-eight".