28124307705647 has 2 divisors, whose sum is σ = 28124307705648. Its totient is φ = 28124307705646.

The previous prime is 28124307705581. The next prime is 28124307705667. The reversal of 28124307705647 is 74650770342182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28124307705647 - 2¹⁴ = 28124307689263 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28124307705592 and 28124307705601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28124307705667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14062153852823 + 14062153852824.

It is an arithmetic number, because the mean of its divisors is an integer number (14062153852824).

Almost surely, 2^{28124307705647} is an apocalyptic number.

28124307705647 is a deficient number, since it is larger than the sum of its proper divisors (1).

28124307705647 is an equidigital number, since it uses as much as digits as its factorization.

28124307705647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15805440, while the sum is 56.

The spelling of 28124307705647 in words is "twenty-eight trillion, one hundred twenty-four billion, three hundred seven million, seven hundred five thousand, six hundred forty-seven".