28086138550213 has 2 divisors, whose sum is σ = 28086138550214. Its totient is φ = 28086138550212.

The previous prime is 28086138550193. The next prime is 28086138550273. The reversal of 28086138550213 is 31205583168082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18060315566049 + 10025822984164 = 4249743^2 + 3166358^2 .

It is a cyclic number.

It is not a de Polignac number, because 28086138550213 - 2⁹ = 28086138549701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28086138550273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14043069275106 + 14043069275107.

It is an arithmetic number, because the mean of its divisors is an integer number (14043069275107).

Almost surely, 2^{28086138550213} is an apocalyptic number.

It is an amenable number.

28086138550213 is a deficient number, since it is larger than the sum of its proper divisors (1).

28086138550213 is an equidigital number, since it uses as much as digits as its factorization.

28086138550213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2764800, while the sum is 52.

The spelling of 28086138550213 in words is "twenty-eight trillion, eighty-six billion, one hundred thirty-eight million, five hundred fifty thousand, two hundred thirteen".