FILE NO. 333-28537
                                                                  RULE 424(B)(3)
 
                             PROSPECTUS SUPPLEMENT
                       (TO PROSPECTUS DATED JULY 7, 1997)
                 (TO PROSPECTUS SUPPLEMENT DATED JULY 7, 1997)
 
                                     PROSPECTUS NUMBER: 1638
                                     DATED: JANUARY 13, 1998
 
 
                           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>
 
BASE RATE:                Fed Funds (Prior Day H.15)
 
 
INDEX MATURITY:           One Day
 
 
TRADE DATE:               January 13, 1998
 
 
SETTLEMENT DATE:          January 16, 1998
 
 
MATURITY DATE:            January 18, 2000
 
 
REDEMPTION DATE:          N/A
 
 
OPTIONAL REPAYMENT DATES: N/A
 
 
SPREAD:                   0.200% (Plus twenty bps)
 
 
COMMISSION:               0.175%
 
 
SPREAD MULTIPLIER:        N/A
 
 
MAXIMUM INTEREST RATE:    N/A
 
 
MINIMUM INTEREST RATE:    N/A
 
 
INTEREST RESET DATES:     Daily, commencing with the First Payment
 
 
INTEREST PAYMENT DATES:   1/19/99, 4/18/99, 7/18/99, 10/18/99 and Maturity, subject to Following
                          Business Day Convention. (Note: first payment is fixed, subsequent
                          payments are floating.)
 
 
INITIAL INTEREST RATE:    5.63%
 
 
FORM:                     Book-entry
 
 
</TABLE>
 
 
                                         CUSIP # 59018SZH0
                                         PRINCIPAL $110,000,000.00