What is the largest number of interfaces implemented on a single object in dotnet/runtime?

[tacosontitan]

This is purely a curiosity, but I was looking at the documentation for BigInteger and noticed just how many interfaces it's implementing:

I assume that this shows the entire hierarchy since here in dotnet/runtime the implementation list isn't as verbose:

runtime/src/libraries/System.Runtime.Numerics/src/System/Numerics/BigInteger.cs

Lines 17 to 24 in 62d2c91

	public readonly struct BigInteger
	: ISpanFormattable,
	IComparable,
	IComparable<BigInteger>,
	IEquatable<BigInteger>,
	IBinaryInteger<BigInteger>,
	ISignedNumber<BigInteger>
	{

This got me thinking however, does anyone have a best guess of the object with the most implementations as defined in dotnet/runtime (not full hierarchy)?

[DaZombieKiller]

The answer appears to be double, at 37 interfaces. Notably though, it's not the only type with this many interfaces (float is another) -- most of the primitives with support for generic math implement the same number of interfaces or something close to it.