We consider the general representation of a tensor function of the state of anisotropic materials in the Euclidean space when the parameters of anisotropy are variable tensors of an arbitrary rank. Based on the generalizations of orthogonal and antisymmetric tensors of higher ranks, we write the equation of the tensor structure of a rotational function of arbitrary rank and the rule for its differentiation in direct (componentless) form. These relations can be used in the problems of the nonlinear mechanics of deformable solids concerning the influence of residual stresses on disturbances of an arbitrary nature in an anisotropic deformable solid.