168905606399 has 8 divisors (see below), whose sum is σ = 169381004160. Its totient is φ = 168430841856.

The previous prime is 168905606381. The next prime is 168905606423. The reversal of 168905606399 is 993606509861.

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 168905606399 - 2²⁴ = 168888829183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168905606339) 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, 378482 + ... + 693584.

It is an arithmetic number, because the mean of its divisors is an integer number (21172625520).

Almost surely, 2^168905606399 is an apocalyptic number.

168905606399 is a deficient number, since it is larger than the sum of its proper divisors (475397761).

168905606399 is an equidigital number, since it uses as much as digits as its factorization.

168905606399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316609.

The product of its (nonzero) digits is 18895680, while the sum is 62.

The spelling of 168905606399 in words is "one hundred sixty-eight billion, nine hundred five million, six hundred six thousand, three hundred ninety-nine".