28216424129 has 2 divisors, whose sum is σ = 28216424130. Its totient is φ = 28216424128.

The previous prime is 28216424113. The next prime is 28216424149. The reversal of 28216424129 is 92142461282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23059029904 + 5157394225 = 151852^2 + 71815^2 .

It is a cyclic number.

It is not a de Polignac number, because 28216424129 - 2⁴ = 28216424113 is a prime.

It is a super-2 number, since 2×28216424129² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28216424149) 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, 14108212064 + 14108212065.

It is an arithmetic number, because the mean of its divisors is an integer number (14108212065).

Almost surely, 2^28216424129 is an apocalyptic number.

It is an amenable number.

28216424129 is a deficient number, since it is larger than the sum of its proper divisors (1).

28216424129 is an equidigital number, since it uses as much as digits as its factorization.

28216424129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 110592, while the sum is 41.

The spelling of 28216424129 in words is "twenty-eight billion, two hundred sixteen million, four hundred twenty-four thousand, one hundred twenty-nine".