243888961317 has 16 divisors (see below), whose sum is σ = 330332989440. Its totient is φ = 160023113712.

The previous prime is 243888961301. The next prime is 243888961321. The reversal of 243888961317 is 713169888342.

243888961317 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 243888961317 - 2⁴ = 243888961301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243888961817) 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, 314517 + ... + 765962.

It is an arithmetic number, because the mean of its divisors is an integer number (20645811840).

Almost surely, 2^243888961317 is an apocalyptic number.

It is an amenable number.

243888961317 is a deficient number, since it is larger than the sum of its proper divisors (86444028123).

243888961317 is a wasteful number, since it uses less digits than its factorization.

243888961317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081672.

The product of its digits is 13934592, while the sum is 60.

The spelling of 243888961317 in words is "two hundred forty-three billion, eight hundred eighty-eight million, nine hundred sixty-one thousand, three hundred seventeen".