FILE NO. 333-59997
                                                                  RULE 424(B)(3)
 
                             PROSPECTUS SUPPLEMENT
       (TO THE PROSPECTUS AND PROSPECTUS SUPPLEMENT DATED JULY 30, 1998)
                                     PROSPECTUS NUMBER: 1843
 
 
                           MERRILL LYNCH & CO., INC.
                          MEDIUM-TERM NOTES, SERIES B
                   DUE NINE MONTHS OR MORE FROM DATE OF ISSUE
 
                                FIXED RATE NOTES
 
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<S>                      <C>
 
PRINCIPAL AMOUNT:        $50,000,000
 
 
CUSIP NUMBER:            59018S Z64
 
 
INTEREST RATE:           5.50000%
 
 
ORIGINAL ISSUE DATE:     February 10, 1999
 
 
STATED MATURITY DATE:    February 15, 2001
 
 
INTEREST PAYMENT DATES:  Each February 15 and August 15, commencing on August 15, 1999, through and
                         including the Stated Maturity Date, subject to 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, 1999
 
 
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