28124808077 has 2 divisors, whose sum is σ = 28124808078. Its totient is φ = 28124808076.

The previous prime is 28124808059. The next prime is 28124808079. The reversal of 28124808077 is 77080842182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22956492196 + 5168315881 = 151514^2 + 71891^2 .

It is a cyclic number.

It is not a de Polignac number, because 28124808077 - 2²⁰ = 28123759501 is a prime.

Together with 28124808079, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28124808079) 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, 14062404038 + 14062404039.

It is an arithmetic number, because the mean of its divisors is an integer number (14062404039).

Almost surely, 2^28124808077 is an apocalyptic number.

It is an amenable number.

28124808077 is a deficient number, since it is larger than the sum of its proper divisors (1).

28124808077 is an equidigital number, since it uses as much as digits as its factorization.

28124808077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 401408, while the sum is 47.

The spelling of 28124808077 in words is "twenty-eight billion, one hundred twenty-four million, eight hundred eight thousand, seventy-seven".