28705845133057 has 2 divisors, whose sum is σ = 28705845133058. Its totient is φ = 28705845133056.

The previous prime is 28705845133033. The next prime is 28705845133067. The reversal of 28705845133057 is 75033154850782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15054896644096 + 13650948488961 = 3880064^2 + 3694719^2 .

It is a cyclic number.

It is not a de Polignac number, because 28705845133057 - 2¹⁹ = 28705844608769 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28705845132992 and 28705845133010.

It is not a weakly prime, because it can be changed into another prime (28705845133067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14352922566528 + 14352922566529.

It is an arithmetic number, because the mean of its divisors is an integer number (14352922566529).

Almost surely, 2^{28705845133057} is an apocalyptic number.

It is an amenable number.

28705845133057 is a deficient number, since it is larger than the sum of its proper divisors (1).

28705845133057 is an equidigital number, since it uses as much as digits as its factorization.

28705845133057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224000, while the sum is 58.

The spelling of 28705845133057 in words is "twenty-eight trillion, seven hundred five billion, eight hundred forty-five million, one hundred thirty-three thousand, fifty-seven".