FILE NO. 333-59997
                                                                  RULE 424(B)(3)
 
                             PROSPECTUS SUPPLEMENT
       (TO THE PROSPECTUS AND PROSPECTUS SUPPLEMENT DATED JULY 30, 1998)
                                     PROSPECTUS NUMBER: 1841
 
 
                           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:        $30,000,000
 
 
CUSIP NUMBER:            59018S Z49
 
 
INTEREST RATE:           5.39000%
 
 
ORIGINAL ISSUE DATE:     February 8, 1999
 
 
STATED MATURITY DATE:    February 8, 2001
 
 
INTEREST PAYMENT DATES:  Each February 8 and August 8, commencing on August 8, 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 3, 1999
 
 
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