Sqlplus Getting rid off exponential values

SQL> select messagelogid from ipx.message_transaction_log where vsize(userdata)= 256;

MESSAGELOGID

------------

2.5865E+10

2.5867E+10

2.5867E+10

2.5962E+10

SQL> column messagelogid format 99999999999999999999999

SQL> select messagelogid from ipx.message_transaction_log where vsize(userdata)= 256;

MESSAGELOGID

------------------------

25864943806

25867126552

25867145531

25961831675