28548268669 has 2 divisors, whose sum is σ = 28548268670. Its totient is φ = 28548268668.

The previous prime is 28548268627. The next prime is 28548268681. The reversal of 28548268669 is 96686284582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25110205444 + 3438063225 = 158462^2 + 58635^2 .

It is a cyclic number.

It is not a de Polignac number, because 28548268669 - 2²⁵ = 28514714237 is a prime.

It is a super-2 number, since 2×28548268669² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28548268669.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28548260669) 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, 14274134334 + 14274134335.

It is an arithmetic number, because the mean of its divisors is an integer number (14274134335).

Almost surely, 2^28548268669 is an apocalyptic number.

It is an amenable number.

28548268669 is a deficient number, since it is larger than the sum of its proper divisors (1).

28548268669 is an equidigital number, since it uses as much as digits as its factorization.

28548268669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 79626240, while the sum is 64.

The spelling of 28548268669 in words is "twenty-eight billion, five hundred forty-eight million, two hundred sixty-eight thousand, six hundred sixty-nine".