28327830525857 has 2 divisors, whose sum is σ = 28327830525858. Its totient is φ = 28327830525856.

The previous prime is 28327830525817. The next prime is 28327830525913. The reversal of 28327830525857 is 75852503872382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23976730732816 + 4351099793041 = 4896604^2 + 2085929^2 .

It is a cyclic number.

It is not a de Polignac number, because 28327830525857 - 2⁸ = 28327830525601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28327830525793 and 28327830525802.

It is not a weakly prime, because it can be changed into another prime (28327830525817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14163915262928 + 14163915262929.

It is an arithmetic number, because the mean of its divisors is an integer number (14163915262929).

Almost surely, 2^{28327830525857} is an apocalyptic number.

It is an amenable number.

28327830525857 is a deficient number, since it is larger than the sum of its proper divisors (1).

28327830525857 is an equidigital number, since it uses as much as digits as its factorization.

28327830525857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225792000, while the sum is 65.

The spelling of 28327830525857 in words is "twenty-eight trillion, three hundred twenty-seven billion, eight hundred thirty million, five hundred twenty-five thousand, eight hundred fifty-seven".