171887786168 has 32 divisors (see below), whose sum is σ = 376896812160. Its totient is φ = 71953025760.

The previous prime is 171887786141. The next prime is 171887786173. The reversal of 171887786168 is 861687788171.

It is a happy number.

171887786168 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×171887786168² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 171887786098 and 171887786107.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35688578 + ... + 35693393.

It is an arithmetic number, because the mean of its divisors is an integer number (11778025380).

Almost surely, 2^171887786168 is an apocalyptic number.

It is an amenable number.

171887786168 is an abundant number, since it is smaller than the sum of its proper divisors (205009025992).

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

171887786168 is a wasteful number, since it uses less digits than its factorization.

171887786168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71382027 (or 71382023 counting only the distinct ones).

The product of its digits is 50577408, while the sum is 68.

The spelling of 171887786168 in words is "one hundred seventy-one billion, eight hundred eighty-seven million, seven hundred eighty-six thousand, one hundred sixty-eight".