171880663360878 has 48 divisors (see below), whose sum is σ = 375558160395600. Its totient is φ = 56810553921792.

The previous prime is 171880663360877. The next prime is 171880663360909. The reversal of 171880663360878 is 878063366088171.

171880663360878 is a `hidden beast` number, since 1 + 7 + 1 + 8 + 8 + 0 + 6 + 6 + 3 + 3 + 608 + 7 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171880663360871) 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 23 ways as a sum of consecutive naturals, for example, 66376653 + ... + 68917496.

It is an arithmetic number, because the mean of its divisors is an integer number (7824128341575).

Almost surely, 2^{171880663360878} is an apocalyptic number.

171880663360878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

171880663360878 is an abundant number, since it is smaller than the sum of its proper divisors (203677497034722).

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

171880663360878 is a wasteful number, since it uses less digits than its factorization.

171880663360878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135294753 (or 135294750 counting only the distinct ones).

The product of its (nonzero) digits is 390168576, while the sum is 72.

The spelling of 171880663360878 in words is "one hundred seventy-one trillion, eight hundred eighty billion, six hundred sixty-three million, three hundred sixty thousand, eight hundred seventy-eight".