43056665009 has 2 divisors, whose sum is σ = 43056665010. Its totient is φ = 43056665008.

The previous prime is 43056664979. The next prime is 43056665059. The reversal of 43056665009 is 90056665034.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32705637409 + 10351027600 = 180847^2 + 101740^2 .

It is a cyclic number.

It is not a de Polignac number, because 43056665009 - 2²⁸ = 42788229553 is a prime.

It is not a weakly prime, because it can be changed into another prime (43056665059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21528332504 + 21528332505.

It is an arithmetic number, because the mean of its divisors is an integer number (21528332505).

Almost surely, 2^43056665009 is an apocalyptic number.

It is an amenable number.

43056665009 is a deficient number, since it is larger than the sum of its proper divisors (1).

43056665009 is an equidigital number, since it uses as much as digits as its factorization.

43056665009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 583200, while the sum is 44.

The spelling of 43056665009 in words is "forty-three billion, fifty-six million, six hundred sixty-five thousand, nine".