168512907389 has 8 divisors (see below), whose sum is σ = 172455937632. Its totient is φ = 164570973840.

The previous prime is 168512907379. The next prime is 168512907413. The reversal of 168512907389 is 983709215861.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168512907389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168512907349) 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, 40919 + ... + 581979.

It is an arithmetic number, because the mean of its divisors is an integer number (21556992204).

Almost surely, 2^168512907389 is an apocalyptic number.

It is an amenable number.

168512907389 is a deficient number, since it is larger than the sum of its proper divisors (3943030243).

168512907389 is an equidigital number, since it uses as much as digits as its factorization.

168512907389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548347.

The product of its (nonzero) digits is 6531840, while the sum is 59.

The spelling of 168512907389 in words is "one hundred sixty-eight billion, five hundred twelve million, nine hundred seven thousand, three hundred eighty-nine".