40204385333809 has 2 divisors, whose sum is σ = 40204385333810. Its totient is φ = 40204385333808.

The previous prime is 40204385333803. The next prime is 40204385333837. The reversal of 40204385333809 is 90833358340204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29867536614400 + 10336848719409 = 5465120^2 + 3215097^2 .

It is a cyclic number.

It is not a de Polignac number, because 40204385333809 - 2⁷ = 40204385333681 is a prime.

It is not a weakly prime, because it can be changed into another prime (40204385333803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20102192666904 + 20102192666905.

It is an arithmetic number, because the mean of its divisors is an integer number (20102192666905).

Almost surely, 2^{40204385333809} is an apocalyptic number.

It is an amenable number.

40204385333809 is a deficient number, since it is larger than the sum of its proper divisors (1).

40204385333809 is an equidigital number, since it uses as much as digits as its factorization.

40204385333809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7464960, while the sum is 52.

The spelling of 40204385333809 in words is "forty trillion, two hundred four billion, three hundred eighty-five million, three hundred thirty-three thousand, eight hundred nine".