208032365509 has 2 divisors, whose sum is σ = 208032365510. Its totient is φ = 208032365508.

The previous prime is 208032365479. The next prime is 208032365533. The reversal of 208032365509 is 905563230802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196340268609 + 11692096900 = 443103^2 + 108130^2 .

It is a cyclic number.

It is not a de Polignac number, because 208032365509 - 2¹³ = 208032357317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208032365309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104016182754 + 104016182755.

It is an arithmetic number, because the mean of its divisors is an integer number (104016182755).

Almost surely, 2^208032365509 is an apocalyptic number.

It is an amenable number.

208032365509 is a deficient number, since it is larger than the sum of its proper divisors (1).

208032365509 is an equidigital number, since it uses as much as digits as its factorization.

208032365509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 208032365509 in words is "two hundred eight billion, thirty-two million, three hundred sixty-five thousand, five hundred nine".