1628665173089 has 2 divisors, whose sum is σ = 1628665173090. Its totient is φ = 1628665173088.

The previous prime is 1628665173043. The next prime is 1628665173097. The reversal of 1628665173089 is 9803715668261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1615674872464 + 12990300625 = 1271092^2 + 113975^2 .

It is a cyclic number.

It is not a de Polignac number, because 1628665173089 - 2⁸ = 1628665172833 is a prime.

It is not a weakly prime, because it can be changed into another prime (1628665173389) 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, 814332586544 + 814332586545.

It is an arithmetic number, because the mean of its divisors is an integer number (814332586545).

Almost surely, 2^{1628665173089} is an apocalyptic number.

It is an amenable number.

1628665173089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1628665173089 is an equidigital number, since it uses as much as digits as its factorization.

1628665173089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26127360, while the sum is 62.

The spelling of 1628665173089 in words is "one trillion, six hundred twenty-eight billion, six hundred sixty-five million, one hundred seventy-three thousand, eighty-nine".