16645577017 has 2 divisors, whose sum is σ = 16645577018. Its totient is φ = 16645577016.

The previous prime is 16645576973. The next prime is 16645577033. The reversal of 16645577017 is 71077554661.

16645577017 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15046456896 + 1599120121 = 122664^2 + 39989^2 .

It is a cyclic number.

It is not a de Polignac number, because 16645577017 - 2¹¹ = 16645574969 is a prime.

It is not a weakly prime, because it can be changed into another prime (16645577717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8322788508 + 8322788509.

It is an arithmetic number, because the mean of its divisors is an integer number (8322788509).

Almost surely, 2^16645577017 is an apocalyptic number.

It is an amenable number.

16645577017 is a deficient number, since it is larger than the sum of its proper divisors (1).

16645577017 is an equidigital number, since it uses as much as digits as its factorization.

16645577017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1234800, while the sum is 49.

The spelling of 16645577017 in words is "sixteen billion, six hundred forty-five million, five hundred seventy-seven thousand, seventeen".