Security – Is it safe to share half of my private key in WIF format?

Assume you generate your key at https://www.bitaddress.org.

Is it safe to share the following four pieces of data?

One half of the private key.
The public key.
An SHA512 hash of the private key.
An SHA512 hash of the public key.

A private key is a string expressed as a 52-digit hexadecimal number. Half of the private key is the first 1 to 26 characters of this string.

Can we assume that the person receiving this information cannot reconstruct the private key by combining this information intelligently or executing an attack such as a brute force attack?