16550549 has 2 divisors, whose sum is σ = 16550550. Its totient is φ = 16550548.

The previous prime is 16550509. The next prime is 16550557. The reversal of 16550549 is 94505561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10824100 + 5726449 = 3290^2 + 2393^2 .

It is an emirp because it is prime and its reverse (94505561) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16550549 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16550509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8275274 + 8275275.

It is an arithmetic number, because the mean of its divisors is an integer number (8275275).

Almost surely, 2^16550549 is an apocalyptic number.

It is an amenable number.

16550549 is a deficient number, since it is larger than the sum of its proper divisors (1).

16550549 is an equidigital number, since it uses as much as digits as its factorization.

16550549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 16550549 is about 4068.2365958730. The cubic root of 16550549 is about 254.8418807005.

The spelling of 16550549 in words is "sixteen million, five hundred fifty thousand, five hundred forty-nine".