163543441889 has 4 divisors (see below), whose sum is σ = 165846870720. Its totient is φ = 161240013060.

The previous prime is 163543441879. The next prime is 163543441909. The reversal of 163543441889 is 988144345361.

It is a happy number.

163543441889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163543441889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163543441819) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1151714309 + ... + 1151714450.

It is an arithmetic number, because the mean of its divisors is an integer number (41461717680).

Almost surely, 2^163543441889 is an apocalyptic number.

It is an amenable number.

163543441889 is a deficient number, since it is larger than the sum of its proper divisors (2303428831).

163543441889 is an equidigital number, since it uses as much as digits as its factorization.

163543441889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2303428830.

The product of its digits is 9953280, while the sum is 56.

The spelling of 163543441889 in words is "one hundred sixty-three billion, five hundred forty-three million, four hundred forty-one thousand, eight hundred eighty-nine".