43611057599909 has 2 divisors, whose sum is σ = 43611057599910. Its totient is φ = 43611057599908.

The previous prime is 43611057599881. The next prime is 43611057599959. The reversal of 43611057599909 is 90999575011634.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38641515412900 + 4969542187009 = 6216230^2 + 2229247^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43611057599909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43611057599959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21805528799954 + 21805528799955.

It is an arithmetic number, because the mean of its divisors is an integer number (21805528799955).

Almost surely, 2^{43611057599909} is an apocalyptic number.

It is an amenable number.

43611057599909 is a deficient number, since it is larger than the sum of its proper divisors (1).

43611057599909 is an equidigital number, since it uses as much as digits as its factorization.

43611057599909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82668600, while the sum is 68.

The spelling of 43611057599909 in words is "forty-three trillion, six hundred eleven billion, fifty-seven million, five hundred ninety-nine thousand, nine hundred nine".