16202543009 has 2 divisors, whose sum is σ = 16202543010. Its totient is φ = 16202543008.

The previous prime is 16202543003. The next prime is 16202543023. The reversal of 16202543009 is 90034520261.

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., 15835705600 + 366837409 = 125840^2 + 19153^2 .

It is a cyclic number.

It is not a de Polignac number, because 16202543009 - 2⁸ = 16202542753 is a prime.

It is not a weakly prime, because it can be changed into another prime (16202543003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8101271504 + 8101271505.

It is an arithmetic number, because the mean of its divisors is an integer number (8101271505).

Almost surely, 2^16202543009 is an apocalyptic number.

It is an amenable number.

16202543009 is a deficient number, since it is larger than the sum of its proper divisors (1).

16202543009 is an equidigital number, since it uses as much as digits as its factorization.

16202543009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 32.

The spelling of 16202543009 in words is "sixteen billion, two hundred two million, five hundred forty-three thousand, nine".