40564298909 has 2 divisors, whose sum is σ = 40564298910. Its totient is φ = 40564298908.

The previous prime is 40564298869. The next prime is 40564298917. The reversal of 40564298909 is 90989246504.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40066027225 + 498271684 = 200165^2 + 22322^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40564298909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40564298989) 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, 20282149454 + 20282149455.

It is an arithmetic number, because the mean of its divisors is an integer number (20282149455).

Almost surely, 2^40564298909 is an apocalyptic number.

It is an amenable number.

40564298909 is a deficient number, since it is larger than the sum of its proper divisors (1).

40564298909 is an equidigital number, since it uses as much as digits as its factorization.

40564298909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5598720, while the sum is 56.

The spelling of 40564298909 in words is "forty billion, five hundred sixty-four million, two hundred ninety-eight thousand, nine hundred nine".