10046 trace.. bind question

From the 10046 trace, I am trying to check the datatype of the bind:

 Bind#0
  oacdty=01 mxl=128(57) mxlc=00 mal=00 scl=00 pre=00
  oacflg=05 fl2=1000000 frm=01 csi=871 siz=128 off=0
  kxsbbbfp=ffffffff7b241690  bln=128  avl=19  flg=05
  value="1328421295250160905"


Here, oacdty=01, and value within double quotes tells me that it is
varchar2. Whereas, I am expecting the variable type in the code to be
declared as number.

Does oacdty=01 mean the type is varchar2 ?

Thanks,

-- 
Arul

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