209163495845 has 16 divisors (see below), whose sum is σ = 251264332800. Its totient is φ = 167152136064.

The previous prime is 209163495781. The next prime is 209163495857. The reversal of 209163495845 is 548594361902.

209163495845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 209163495845 - 2⁶ = 209163495781 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38681132 + ... + 38686538.

It is an arithmetic number, because the mean of its divisors is an integer number (15704020800).

Almost surely, 2^209163495845 is an apocalyptic number.

It is an amenable number.

209163495845 is a deficient number, since it is larger than the sum of its proper divisors (42100836955).

209163495845 is a wasteful number, since it uses less digits than its factorization.

209163495845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12244.

The product of its (nonzero) digits is 9331200, while the sum is 56.

The spelling of 209163495845 in words is "two hundred nine billion, one hundred sixty-three million, four hundred ninety-five thousand, eight hundred forty-five".