171887468857 has 8 divisors (see below), whose sum is σ = 185438381184. Its totient is φ = 158383527888.

The previous prime is 171887468839. The next prime is 171887468897. The reversal of 171887468857 is 758864788171.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 171887468857 - 2⁷ = 171887468729 is a prime.

It is a super-2 number, since 2×171887468857² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171887468897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11735233 + ... + 11749870.

It is an arithmetic number, because the mean of its divisors is an integer number (23179797648).

Almost surely, 2^171887468857 is an apocalyptic number.

It is an amenable number.

171887468857 is a deficient number, since it is larger than the sum of its proper divisors (13550912327).

171887468857 is a wasteful number, since it uses less digits than its factorization.

171887468857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23485679.

The product of its digits is 168591360, while the sum is 70.

The spelling of 171887468857 in words is "one hundred seventy-one billion, eight hundred eighty-seven million, four hundred sixty-eight thousand, eight hundred fifty-seven".