1664556224269 has 2 divisors, whose sum is σ = 1664556224270. Its totient is φ = 1664556224268.

The previous prime is 1664556224209. The next prime is 1664556224329. The reversal of 1664556224269 is 9624226554661.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1664556224209) and next prime (1664556224329).

It can be written as a sum of positive squares in only one way, i.e., 1535958678244 + 128597546025 = 1239338^2 + 358605^2 .

It is a cyclic number.

It is not a de Polignac number, because 1664556224269 - 2³⁵ = 1630196485901 is a prime.

It is a super-2 number, since 2×1664556224269² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1664556224209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832278112134 + 832278112135.

It is an arithmetic number, because the mean of its divisors is an integer number (832278112135).

Almost surely, 2^{1664556224269} is an apocalyptic number.

It is an amenable number.

1664556224269 is a deficient number, since it is larger than the sum of its proper divisors (1).

1664556224269 is an equidigital number, since it uses as much as digits as its factorization.

1664556224269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37324800, while the sum is 58.

The spelling of 1664556224269 in words is "one trillion, six hundred sixty-four billion, five hundred fifty-six million, two hundred twenty-four thousand, two hundred sixty-nine".