171178222878 has 96 divisors (see below), whose sum is σ = 402385052160. Its totient is φ = 52279810560.

The previous prime is 171178222861. The next prime is 171178222931. The reversal of 171178222878 is 878222871171.

171178222878 is a `hidden beast` number, since 171 + 178 + 22 + 287 + 8 = 666.

171178222878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24095875 + ... + 24102977.

It is an arithmetic number, because the mean of its divisors is an integer number (4191510960).

Almost surely, 2^171178222878 is an apocalyptic number.

171178222878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 171178222878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201192526080).

171178222878 is an abundant number, since it is smaller than the sum of its proper divisors (231206829282).

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

171178222878 is a wasteful number, since it uses less digits than its factorization.

171178222878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7874 (or 7871 counting only the distinct ones).

The product of its digits is 1404928, while the sum is 54.

The spelling of 171178222878 in words is "one hundred seventy-one billion, one hundred seventy-eight million, two hundred twenty-two thousand, eight hundred seventy-eight".