16500018653 has 2 divisors, whose sum is σ = 16500018654. Its totient is φ = 16500018652.

The previous prime is 16500018641. The next prime is 16500018673. The reversal of 16500018653 is 35681000561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13279796644 + 3220222009 = 115238^2 + 56747^2 .

It is a cyclic number.

It is not a de Polignac number, because 16500018653 - 2²⁰ = 16498970077 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16500018673) 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, 8250009326 + 8250009327.

It is an arithmetic number, because the mean of its divisors is an integer number (8250009327).

Almost surely, 2^16500018653 is an apocalyptic number.

It is an amenable number.

16500018653 is a deficient number, since it is larger than the sum of its proper divisors (1).

16500018653 is an equidigital number, since it uses as much as digits as its factorization.

16500018653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 16500018653 in words is "sixteen billion, five hundred million, eighteen thousand, six hundred fifty-three".