FILE NO. 333-59997
                                                                  RULE 424(B)(3)
 
                             PROSPECTUS SUPPLEMENT
       (TO THE PROSPECTUS AND PROSPECTUS SUPPLEMENT DATED JULY 30, 1998)
                                     PROSPECTUS NUMBER: 1780
 
 
                           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:        $20,000,000
 
 
CUSIP NUMBER:            59018SR71
 
 
INTEREST RATE:           6.00000%
 
 
ORIGINAL ISSUE DATE:     October 9, 1998
 
 
STATED MATURITY DATE:    October 11, 2005
 
 
INTEREST PAYMENT DATES:  Each May 15 and November 15, commencing on November 15, 1998 to 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:                   October 8, 1998
 
 
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