28686553161229 has 2 divisors, whose sum is σ = 28686553161230. Its totient is φ = 28686553161228.

The previous prime is 28686553161221. The next prime is 28686553161241. The reversal of 28686553161229 is 92216135568682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18232473002500 + 10454080158729 = 4269950^2 + 3233277^2 .

It is a cyclic number.

It is not a de Polignac number, because 28686553161229 - 2³ = 28686553161221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28686553161221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14343276580614 + 14343276580615.

It is an arithmetic number, because the mean of its divisors is an integer number (14343276580615).

Almost surely, 2^{28686553161229} is an apocalyptic number.

It is an amenable number.

28686553161229 is a deficient number, since it is larger than the sum of its proper divisors (1).

28686553161229 is an equidigital number, since it uses as much as digits as its factorization.

28686553161229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 74649600, while the sum is 64.

The spelling of 28686553161229 in words is "twenty-eight trillion, six hundred eighty-six billion, five hundred fifty-three million, one hundred sixty-one thousand, two hundred twenty-nine".