16650548272789 has 2 divisors, whose sum is σ = 16650548272790. Its totient is φ = 16650548272788.

The previous prime is 16650548272783. The next prime is 16650548272819. The reversal of 16650548272789 is 98727284505661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11149201477764 + 5501346795025 = 3339042^2 + 2345495^2 .

It is a cyclic number.

It is not a de Polignac number, because 16650548272789 - 2³ = 16650548272781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16650548272781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8325274136394 + 8325274136395.

It is an arithmetic number, because the mean of its divisors is an integer number (8325274136395).

Almost surely, 2^{16650548272789} is an apocalyptic number.

It is an amenable number.

16650548272789 is a deficient number, since it is larger than the sum of its proper divisors (1).

16650548272789 is an equidigital number, since it uses as much as digits as its factorization.

16650548272789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 406425600, while the sum is 70.

The spelling of 16650548272789 in words is "sixteen trillion, six hundred fifty billion, five hundred forty-eight million, two hundred seventy-two thousand, seven hundred eighty-nine".