163564867788 has 96 divisors (see below), whose sum is σ = 460342579200. Its totient is φ = 44156218176.

The previous prime is 163564867783. The next prime is 163564867789. The reversal of 163564867788 is 887768465361.

It is not an unprimeable number, because it can be changed into a prime (163564867783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 469681 + ... + 740087.

It is an arithmetic number, because the mean of its divisors is an integer number (4795235200).

Almost surely, 2^163564867788 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163564867788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230171289600).

163564867788 is an abundant number, since it is smaller than the sum of its proper divisors (296777711412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163564867788 is a wasteful number, since it uses less digits than its factorization.

163564867788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270819 (or 270817 counting only the distinct ones).

The product of its digits is 325140480, while the sum is 69.

The spelling of 163564867788 in words is "one hundred sixty-three billion, five hundred sixty-four million, eight hundred sixty-seven thousand, seven hundred eighty-eight".