243943521164 has 48 divisors (see below), whose sum is σ = 533250385920. Its totient is φ = 95223271680.

The previous prime is 243943521163. The next prime is 243943521197. The reversal of 243943521164 is 461125349342.

243943521164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (243943521163) 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 15 ways as a sum of consecutive naturals, for example, 8251154 + ... + 8280665.

It is an arithmetic number, because the mean of its divisors is an integer number (11109383040).

Almost surely, 2^243943521164 is an apocalyptic number.

It is an amenable number.

243943521164 is an abundant number, since it is smaller than the sum of its proper divisors (289306864756).

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

243943521164 is a wasteful number, since it uses less digits than its factorization.

243943521164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16531878 (or 16531876 counting only the distinct ones).

The product of its digits is 622080, while the sum is 44.

The spelling of 243943521164 in words is "two hundred forty-three billion, nine hundred forty-three million, five hundred twenty-one thousand, one hundred sixty-four".