163321520864 has 12 divisors (see below), whose sum is σ = 321539244264. Its totient is φ = 81660760416.

The previous prime is 163321520779. The next prime is 163321520909. The reversal of 163321520864 is 468025123361.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2551898732 + ... + 2551898795.

It is an arithmetic number, because the mean of its divisors is an integer number (26794937022).

Almost surely, 2^163321520864 is an apocalyptic number.

It is an amenable number.

163321520864 is a deficient number, since it is larger than the sum of its proper divisors (158217723400).

163321520864 is an equidigital number, since it uses as much as digits as its factorization.

163321520864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5103797537 (or 5103797529 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 163321520864 in words is "one hundred sixty-three billion, three hundred twenty-one million, five hundred twenty thousand, eight hundred sixty-four".