28542269309 has 2 divisors, whose sum is σ = 28542269310. Its totient is φ = 28542269308.

The previous prime is 28542269293. The next prime is 28542269321. The reversal of 28542269309 is 90396224582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23058422500 + 5483846809 = 151850^2 + 74053^2 .

It is a cyclic number.

It is not a de Polignac number, because 28542269309 - 2⁴ = 28542269293 is a prime.

It is a super-2 number, since 2×28542269309² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28542269339) 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, 14271134654 + 14271134655.

It is an arithmetic number, because the mean of its divisors is an integer number (14271134655).

Almost surely, 2^28542269309 is an apocalyptic number.

It is an amenable number.

28542269309 is a deficient number, since it is larger than the sum of its proper divisors (1).

28542269309 is an equidigital number, since it uses as much as digits as its factorization.

28542269309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1866240, while the sum is 50.

The spelling of 28542269309 in words is "twenty-eight billion, five hundred forty-two million, two hundred sixty-nine thousand, three hundred nine".