243325920644 has 12 divisors (see below), whose sum is σ = 425960041500. Its totient is φ = 121623051648.

The previous prime is 243325920589. The next prime is 243325920709. The reversal of 243325920644 is 446029523342.

243325920644 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 19254337600 + 224071583044 = 138760^2 + 473362^2 .

It is a junction number, because it is equal to n+sod(n) for n = 243325920595 and 243325920604.

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, 9963449 + ... + 9987840.

It is an arithmetic number, because the mean of its divisors is an integer number (35496670125).

Almost surely, 2^243325920644 is an apocalyptic number.

It is an amenable number.

243325920644 is a deficient number, since it is larger than the sum of its proper divisors (182634120856).

243325920644 is a wasteful number, since it uses less digits than its factorization.

243325920644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19954342 (or 19954340 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 44.

The spelling of 243325920644 in words is "two hundred forty-three billion, three hundred twenty-five million, nine hundred twenty thousand, six hundred forty-four".