40243346449 has 2 divisors, whose sum is σ = 40243346450. Its totient is φ = 40243346448.

The previous prime is 40243346431. The next prime is 40243346501. The reversal of 40243346449 is 94464334204.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32811699600 + 7431646849 = 181140^2 + 86207^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40243346449 is a prime.

It is not a weakly prime, because it can be changed into another prime (40243349449) 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, 20121673224 + 20121673225.

It is an arithmetic number, because the mean of its divisors is an integer number (20121673225).

Almost surely, 2^40243346449 is an apocalyptic number.

It is an amenable number.

40243346449 is a deficient number, since it is larger than the sum of its proper divisors (1).

40243346449 is an equidigital number, since it uses as much as digits as its factorization.

40243346449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 995328, while the sum is 43.

The spelling of 40243346449 in words is "forty billion, two hundred forty-three million, three hundred forty-six thousand, four hundred forty-nine".