OID hrSystemUptime -1.3.6.1.2.1.25.1.1 correct format

Well, that depends on the system reporting it. The reference for the OID says it returns TICKS. On some systems a TICK=SECONDS/100 it is different on others. The OID that Cisco uses is hundredths of a second. So, a PYTHON conversion might look like:

>>> # Timedelta function demonstration
>>> from datetime import datetime, timedelta
>>> ticks = 99439400
>>> seconds = ticks/100
>>>
>>> # Using current time
>>> ini_time_for_now = datetime.now()
>>>
>>> # printing initial_date
>>> print ("initial_date", str(ini_time_for_now))
initial_date 2023-05-24 10:51:21.238179
>>>
>>> # Some another datetime
>>> new_final_time = ini_time_for_now + \
... timedelta(seconds=seconds)
>>>
>>> # printing new final_date
>>> print ("new_final_time", str(new_final_time))
new_final_time 2023-06-04 23:04:35.238179
>>>
>>>
>>> # printing calculated past_dates
>>> print('Time difference:', str(new_final_time - \
... ini_time_for_now))
Time difference: 11 days, 12:13:14

In other environments is can be different for example on my MS Windows PC using PowerShell you get:

PS> $TS = New-Timespan -Seconds 994394
PS> $TS

Days : 11
Hours : 12
Minutes : 13
Seconds : 14
Milliseconds : 0
Ticks : 9943940000000
TotalDays : 11.5091898148148
TotalHours : 276.220555555556
TotalMinutes : 16573.2333333333
TotalSeconds : 994394
TotalMilliseconds : 994394000

Showing TICKS at 12,340,000,000 is SECONDS*10,000,000 or put another way SECONDS=TICKS/10,000,000.

Really need to know where you want the conversation to occur. 

Thanks for your response, the system that is reporting the system uptime is a Palo Alto Firewall

I checked and the Palo Alto firewall is using the standard seconds = ticks/100. Our firewall responded with 321780053. Using PowerShell [because it is easy] 

$TS = New-Timespan -Seconds (321780053/100)

$TS

Days : 37
Hours : 5
Minutes : 50
Seconds : 1
Milliseconds : 0
Ticks : 32178010000000
TotalDays : 37.2430671296296
TotalHours : 893.833611111111
TotalMinutes : 53630.0166666667
TotalSeconds : 3217801
TotalMilliseconds : 3217801000

This corresponds to the Uptime reported in the GUI.

You can transform the Universal poller on that OID to get the Number of Days the system has been up:
Truncate((({hrSystemUptime}/100)/3600)/24,4) or

Truncate((({hrSystemUptime}/8640000),4)

This gives you 4 decimal places which gets you down into milliseconds, if you need it.

Tominannlli, thanks for the insight worked great? Another question, I have a dashboard with a custom table showing firewall objects how can I add this UDP as a column in the table?

Tominannlli, thanks for the insight worked great? Another question, I have a dashboard with a custom table showing firewall objects how can I add this UDP as a column in the table?

https://support.solarwinds.com/SuccessCenter/s/article/How-to-create-customtable-undp-groups?language=en_US

thwack.solarwinds.com/.../undp-as-a-table-on-nodedetails-view