168428192909 has 8 divisors (see below), whose sum is σ = 174243135360. Its totient is φ = 162613722096.

The previous prime is 168428192893. The next prime is 168428192921. The reversal of 168428192909 is 909291824861.

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 168428192909 - 2⁴ = 168428192893 is a prime.

It is a super-3 number, since 3×168428192909³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168428192939) 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, 706424 + ... + 914270.

It is an arithmetic number, because the mean of its divisors is an integer number (21780391920).

Almost surely, 2^168428192909 is an apocalyptic number.

It is an amenable number.

168428192909 is a deficient number, since it is larger than the sum of its proper divisors (5814942451).

168428192909 is a wasteful number, since it uses less digits than its factorization.

168428192909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235819.

The product of its (nonzero) digits is 4478976, while the sum is 59.

The spelling of 168428192909 in words is "one hundred sixty-eight billion, four hundred twenty-eight million, one hundred ninety-two thousand, nine hundred nine".