264643204169 has 2 divisors, whose sum is σ = 264643204170. Its totient is φ = 264643204168.

The previous prime is 264643204127. The next prime is 264643204181. The reversal of 264643204169 is 961402346462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 264607360000 + 35844169 = 514400^2 + 5987^2 .

It is a cyclic number.

It is not a de Polignac number, because 264643204169 - 2²⁰ = 264642155593 is a prime.

It is a super-2 number, since 2×264643204169² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (264643204109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132321602084 + 132321602085.

It is an arithmetic number, because the mean of its divisors is an integer number (132321602085).

Almost surely, 2^264643204169 is an apocalyptic number.

It is an amenable number.

264643204169 is a deficient number, since it is larger than the sum of its proper divisors (1).

264643204169 is an equidigital number, since it uses as much as digits as its factorization.

264643204169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1492992, while the sum is 47.

The spelling of 264643204169 in words is "two hundred sixty-four billion, six hundred forty-three million, two hundred four thousand, one hundred sixty-nine".