168500857321 has 8 divisors (see below), whose sum is σ = 168929483040. Its totient is φ = 168072672768.

The previous prime is 168500857309. The next prime is 168500857351. The reversal of 168500857321 is 123758005861.

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 168500857321 - 2¹⁹ = 168500333033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168500857351) 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, 661410 + ... + 880036.

It is an arithmetic number, because the mean of its divisors is an integer number (21116185380).

Almost surely, 2^168500857321 is an apocalyptic number.

It is an amenable number.

168500857321 is a deficient number, since it is larger than the sum of its proper divisors (428625719).

168500857321 is a wasteful number, since it uses less digits than its factorization.

168500857321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220583.

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 168500857321 in words is "one hundred sixty-eight billion, five hundred million, eight hundred fifty-seven thousand, three hundred twenty-one".