16500604609 has 2 divisors, whose sum is σ = 16500604610. Its totient is φ = 16500604608.

The previous prime is 16500604597. The next prime is 16500604621. The reversal of 16500604609 is 90640600561.

It is a balanced prime because it is at equal distance from previous prime (16500604597) and next prime (16500604621).

It can be written as a sum of positive squares in only one way, i.e., 15094579600 + 1406025009 = 122860^2 + 37497^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16500604609 is a prime.

It is not a weakly prime, because it can be changed into another prime (16500601609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8250302304 + 8250302305.

It is an arithmetic number, because the mean of its divisors is an integer number (8250302305).

Almost surely, 2^16500604609 is an apocalyptic number.

It is an amenable number.

16500604609 is a deficient number, since it is larger than the sum of its proper divisors (1).

16500604609 is an equidigital number, since it uses as much as digits as its factorization.

16500604609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 16500604609 in words is "sixteen billion, five hundred million, six hundred four thousand, six hundred nine".