168208985563 has 16 divisors (see below), whose sum is σ = 178755821280. Its totient is φ = 157980727296.

The previous prime is 168208985551. The next prime is 168208985573. The reversal of 168208985563 is 365589802861.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 168208985563 - 2⁵ = 168208985531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168208985543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4997356 + ... + 5030902.

It is an arithmetic number, because the mean of its divisors is an integer number (11172238830).

Almost surely, 2^168208985563 is an apocalyptic number.

168208985563 is a deficient number, since it is larger than the sum of its proper divisors (10546835717).

168208985563 is a wasteful number, since it uses less digits than its factorization.

168208985563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38286.

The product of its (nonzero) digits is 24883200, while the sum is 61.

The spelling of 168208985563 in words is "one hundred sixty-eight billion, two hundred eight million, nine hundred eighty-five thousand, five hundred sixty-three".