243609861904 has 20 divisors (see below), whose sum is σ = 474019840476. Its totient is φ = 121282161152.

The previous prime is 243609861899. The next prime is 243609861919. The reversal of 243609861904 is 409168906342.

243609861904 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 110457851904 + 133152010000 = 332352^2 + 364900^2 .

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 3 ways as a sum of consecutive naturals, for example, 32669269 + ... + 32676724.

Almost surely, 2^243609861904 is an apocalyptic number.

It is an amenable number.

243609861904 is a deficient number, since it is larger than the sum of its proper divisors (230409978572).

243609861904 is a wasteful number, since it uses less digits than its factorization.

243609861904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65346234 (or 65346228 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 52.

The spelling of 243609861904 in words is "two hundred forty-three billion, six hundred nine million, eight hundred sixty-one thousand, nine hundred four".