FILE NO. 333-44173
                                                                  RULE 424(B)(3)
 
                             PROSPECTUS SUPPLEMENT
          (TO PROSPECTUS AND PROSPECTUS SUPPLEMENT DATED JULY 7, 1997)
 
                                     PROSPECTUS NUMBER: 1648
 
 
 
                           MERRILL LYNCH & CO., INC.
                          MEDIUM-TERM NOTES, SERIES B
                   DUE NINE MONTHS OR MORE FROM DATE OF ISSUE
                              FLOATING RATE NOTES
 
<TABLE>
<CAPTION>
 
<S>                     <C>
 
PRINCIPAL AMOUNT:       $50,000,000
 
 
CUSIP NUMBER:           59018SZW7
 
 
ORIGINAL ISSUE DATE:    February 6, 1998
 
 
STATED MATURITY DATE:   February 8, 1999
 
 
INTEREST CALCULATION:   Regular Floating Rate Note
 
 
DAY COUNT CONVENTION:   Actual/360
 
 
INTEREST RATE BASIS:    LIBOR
 
 
INDEX MATURITY:         Three Month
 
 
SPREAD:                 -0.080%
 
 
INITIAL INTEREST RATE:  5.5450
 
 
MINIMUM INTEREST RATE:  Not Applicable
 
 
MAXIMUM INTEREST RATE:  Not Applicable
 
 
SPREAD MULTIPLIER:      Not Applicable
 
 
INTEREST RESET DATES:   Quarterly on the 8th of February, May, August, November, commencing May 8,
                        1998 through the Maturity Date; subject to modified following business day
                        convention.
 
 
INTEREST PAYMENT DATES: Quarterly on the 8th of February, May, August, November, commencing May 8,
                        1998 through the Maturity Date; subject to modified following business day
                        convention.
 
 
REPAYMENT AT THE
OPTION OF THE HOLDER:   The Notes cannot be repaid prior to the Stated Maturity Date.
 
 
REDEMPTION AT THE
OPTION OF THE COMPANY:  The Notes cannot be redeemed prior to the Stated Maturity Date.
 
 
FORM:                   The Notes are being issued in fully registered book-entry form.
 
 
TRUSTEE:                The Chase Manhattan Bank
 
 
DATED:                  February 5, 1998
 
 
</TABLE>