28686553169229 has 24 divisors (see below), whose sum is σ = 42557845975320. Its totient is φ = 18606698967168.

The previous prime is 28686553169189. The next prime is 28686553169257. The reversal of 28686553169229 is 92296135568682.

28686553169229 is a `hidden beast` number, since 2 + 8 + 6 + 8 + 6 + 5 + 531 + 69 + 2 + 29 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5978993259204 + 22707559910025 = 2445198^2 + 4765245^2 .

It is not a de Polignac number, because 28686553169229 - 2⁷ = 28686553169101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28686553161229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6016027 + ... + 9672935.

It is an arithmetic number, because the mean of its divisors is an integer number (1773243582305).

Almost surely, 2^{28686553169229} is an apocalyptic number.

It is an amenable number.

28686553169229 is a deficient number, since it is larger than the sum of its proper divisors (13871292806091).

28686553169229 is a wasteful number, since it uses less digits than its factorization.

28686553169229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3680509 (or 3680506 counting only the distinct ones).

The product of its digits is 671846400, while the sum is 72.

The spelling of 28686553169229 in words is "twenty-eight trillion, six hundred eighty-six billion, five hundred fifty-three million, one hundred sixty-nine thousand, two hundred twenty-nine".