243147316320643 has 32 divisors (see below), whose sum is σ = 294422008785408. Its totient is φ = 196023600115200.

The previous prime is 243147316320607. The next prime is 243147316320653. The reversal of 243147316320643 is 346023613741342.

It is a cyclic number.

It is not a de Polignac number, because 243147316320643 - 2¹⁷ = 243147316189571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243147316320653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1986647496 + ... + 1986769882.

It is an arithmetic number, because the mean of its divisors is an integer number (9200687774544).

Almost surely, 2^{243147316320643} is an apocalyptic number.

243147316320643 is a deficient number, since it is larger than the sum of its proper divisors (51274692464765).

243147316320643 is a wasteful number, since it uses less digits than its factorization.

243147316320643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133243.

The product of its (nonzero) digits is 5225472, while the sum is 49.

The spelling of 243147316320643 in words is "two hundred forty-three trillion, one hundred forty-seven billion, three hundred sixteen million, three hundred twenty thousand, six hundred forty-three".