28252245169 has 2 divisors, whose sum is σ = 28252245170. Its totient is φ = 28252245168.

The previous prime is 28252245163. The next prime is 28252245199. The reversal of 28252245169 is 96154225282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26992847025 + 1259398144 = 164295^2 + 35488^2 .

It is a cyclic number.

It is not a de Polignac number, because 28252245169 - 2¹³ = 28252236977 is a prime.

It is a super-2 number, since 2×28252245169² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28252245163) 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, 14126122584 + 14126122585.

It is an arithmetic number, because the mean of its divisors is an integer number (14126122585).

Almost surely, 2^28252245169 is an apocalyptic number.

It is an amenable number.

28252245169 is a deficient number, since it is larger than the sum of its proper divisors (1).

28252245169 is an equidigital number, since it uses as much as digits as its factorization.

28252245169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 691200, while the sum is 46.

The spelling of 28252245169 in words is "twenty-eight billion, two hundred fifty-two million, two hundred forty-five thousand, one hundred sixty-nine".