40450211209 has 2 divisors, whose sum is σ = 40450211210. Its totient is φ = 40450211208.

The previous prime is 40450211183. The next prime is 40450211227. The reversal of 40450211209 is 90211205404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22513502025 + 17936709184 = 150045^2 + 133928^2 .

It is a cyclic number.

It is not a de Polignac number, because 40450211209 - 2¹⁷ = 40450080137 is a prime.

It is not a weakly prime, because it can be changed into another prime (40450211909) 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, 20225105604 + 20225105605.

It is an arithmetic number, because the mean of its divisors is an integer number (20225105605).

Almost surely, 2^40450211209 is an apocalyptic number.

It is an amenable number.

40450211209 is a deficient number, since it is larger than the sum of its proper divisors (1).

40450211209 is an equidigital number, since it uses as much as digits as its factorization.

40450211209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 28.

The spelling of 40450211209 in words is "forty billion, four hundred fifty million, two hundred eleven thousand, two hundred nine".