40243600609 has 2 divisors, whose sum is σ = 40243600610. Its totient is φ = 40243600608.

The previous prime is 40243600603. The next prime is 40243600679. The reversal of 40243600609 is 90600634204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39722483025 + 521117584 = 199305^2 + 22828^2 .

It is a cyclic number.

It is not a de Polignac number, because 40243600609 - 2⁹ = 40243600097 is a prime.

It is not a weakly prime, because it can be changed into another prime (40243600603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20121800304 + 20121800305.

It is an arithmetic number, because the mean of its divisors is an integer number (20121800305).

Almost surely, 2^40243600609 is an apocalyptic number.

It is an amenable number.

40243600609 is a deficient number, since it is larger than the sum of its proper divisors (1).

40243600609 is an equidigital number, since it uses as much as digits as its factorization.

40243600609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 34.

The spelling of 40243600609 in words is "forty billion, two hundred forty-three million, six hundred thousand, six hundred nine".