FILE NO. 333-59997
                                                                  RULE 424(B)(3)
 
                             PROSPECTUS SUPPLEMENT
         (TO PROSPECTUS AND PROSPECTUS SUPPLEMENT DATED JULY 30, 1998)
 
                                     PROSPECTUS NUMBER: 1831
 
 
 
                           MERRILL LYNCH & CO., INC.
                          MEDIUM-TERM NOTES, SERIES B
                   DUE NINE MONTHS OR MORE FROM DATE OF ISSUE
                           CALLABLE FIXED RATE NOTES
 


 
                      
 
PRINCIPAL AMOUNT:        $40,000,000
 
 
CUSIP NUMBER:            59018S Y24
 
 
INTEREST RATE:           5.50000%
 
 
ORIGINAL ISSUE DATE:     February 12, 1999
 
 
STATED MATURITY DATE:    February 12, 2004
 
 
INTEREST PAYMENT DATES:  12th day of each month commencing on March 12, 1999, through and including
                         the Stated Maturity Date, subject to the 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 may be redeemed prior to the Stated Maturity Date, See "Other
                         Provisions"
 
 
INITIAL REDEMPTION DATE: February 12, 2002
 
 
OTHER PROVISIONS:        The Notes are subject to redemption at the option of ML&Co., in whole,
                         semi-annually on each February 12 and August 12 commencing February 12,
                         2002, at a redemption price equal to 100% of the principal amount of the
                         Notes upon at least 30 days prior notice.
 
 
FORM:                    The Notes are being issued in fully registered book-entry form.
 
 
TRUSTEE:                 The Chase Manhattan Bank
 
 
DATED:                   January 27, 1999