We show that in every commensurability class of cusped arithmetic hyperbolic manifolds of simplest type of dimension $2n+2\geq 6$ there are manifolds $M$ such that the Stiefel-Whitney classes $w_{2j}(M)$ are non-vanishing for all $0 \leq 2j \leq n$. We also show that for the same commensurability classes there are manifolds (different from the previous ones) that do not admit a $\text{spin}^\mathbb{C}$ structure.

13 pages. Added a new main result regarding manifolds without spin-c structures, and the corresponding secondary results. The authors thank Bruno Martelli for pointing out this application