16128608549 has 2 divisors, whose sum is σ = 16128608550. Its totient is φ = 16128608548.

The previous prime is 16128608521. The next prime is 16128608591. The reversal of 16128608549 is 94580682161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15146224900 + 982383649 = 123070^2 + 31343^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16128608549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16128608497 and 16128608506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16128601549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8064304274 + 8064304275.

It is an arithmetic number, because the mean of its divisors is an integer number (8064304275).

Almost surely, 2^16128608549 is an apocalyptic number.

It is an amenable number.

16128608549 is a deficient number, since it is larger than the sum of its proper divisors (1).

16128608549 is an equidigital number, since it uses as much as digits as its factorization.

16128608549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 829440, while the sum is 50.

The spelling of 16128608549 in words is "sixteen billion, one hundred twenty-eight million, six hundred eight thousand, five hundred forty-nine".