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: 1637
                                     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:                LIBOR
 
 
INDEX MATURITY:           Three Month
 
 
TRADE DATE:               January 13, 1998
 
 
SETTLEMENT DATE:          January 16, 1998
 
 
MATURITY DATE:            July 16, 2001
 
 
REDEMPTION DATE:          N/A
 
 
OPTIONAL REPAYMENT DATES: N/A
 
 
SPREAD:                   0.1000% (Plus ten bps)
 
 
COMMISSION:               0.250%
 
 
SPREAD MULTIPLIER:        N/A
 
 
MAXIMUM INTEREST RATE:    N/A
 
 
MINIMUM INTEREST RATE:    N/A
 
 
INTEREST RESET DATES:     Quarterly
 
 
INTEREST PAYMENT DATES:   The 16th of each January, April, July, and October, commencing on April 16,
                          1998 through and including the Maturity Date; subject to the modified
                          following business day convention.
 
 
INITIAL INTEREST RATE:    5.73%
 
 
FORM:                     Book-entry
 
 
</TABLE>
 
 
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                                         PRINCIPAL $35,000,000.00