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: 1627
                                     DATED: DECEMBER 23, 1997
 
 
                           MERRILL LYNCH & CO., INC.
                          MEDIUM-TERM NOTES, SERIES B
                   DUE NINE MONTHS OR MORE FROM DATE OF ISSUE
                              FLOATING RATE NOTES
 
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<S>                       <C>
 
BASE RATE:                Fed Funds (Prior Day Effective)
 
 
INDEX MATURITY:           One Day
 
 
TRADE DATE:               December 23, 1997
 
 
SETTLEMENT DATE:          December 30, 1997
 
 
MATURITY DATE:            January 4, 1999
 
 
REDEMPTION DATE:          N/A
 
 
OPTIONAL REPAYMENT DATES: N/A
 
 
SPREAD:                   0.080% (plus eight bps)
 
 
COMMISSION                0.075%
 
 
SPREAD MULTIPLIER:        N/A
 
 
MAXIMUM INTEREST RATE:    N/A
 
 
MINIMUM INTEREST RATE:    N/A
 
 
INTEREST RESET DATES:     Daily
 
 
INTEREST PAYMENT DATES:   March 26, 1998, June 26, 1998, September 25, 1998, December 28, 1998 and
                          Maturity, subject to Following Business Day Convention.
 
 
COMMENTS                  Put Provisions: Investor has a right to put the Note to ML&Co. at Par on each
                          Interest Payment Date, subject to providing 14 calendar days notice of
                          exercising the put option.
 
 
INITIAL INTEREST RATE:    TBD, December 30, 1997
 
 
FORM:                     Book-entry
 
 
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