4243564471409 has 2 divisors, whose sum is σ = 4243564471410. Its totient is φ = 4243564471408.

The previous prime is 4243564471379. The next prime is 4243564471459. The reversal of 4243564471409 is 9041744653424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4170192831025 + 73371640384 = 2042105^2 + 270872^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4243564471409 is a prime.

It is not a weakly prime, because it can be changed into another prime (4243564471459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2121782235704 + 2121782235705.

It is an arithmetic number, because the mean of its divisors is an integer number (2121782235705).

Almost surely, 2^{4243564471409} is an apocalyptic number.

It is an amenable number.

4243564471409 is a deficient number, since it is larger than the sum of its proper divisors (1).

4243564471409 is an equidigital number, since it uses as much as digits as its factorization.

4243564471409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11612160, while the sum is 53.

The spelling of 4243564471409 in words is "four trillion, two hundred forty-three billion, five hundred sixty-four million, four hundred seventy-one thousand, four hundred nine".