158 (one hundred [and] fifty-eight) is the natural number following 157 and preceding 159.

In mathematics

158 is a nontotient, since there is no integer with 158 coprimes below it. 158 is a Perrin number, appearing after 68, 90, 119.^[1]

158 is the number of digits in the decimal expansion of 100!, the product of all the natural numbers up to and including 100.

In the military

• USS Amador (AK-158) was a United States Navy Alamosa-class cargo ship during World War II
• USS Caution (AM-158) was a United States Navy Admirable-class minesweeper during World War II
• USS Chase (DE-158) was a United States Navy Buckley-class destroyer escort during World War II
• USS General W. G. Haan (AP-158) was a United States Navy General G. O. Squier-class transport following World War II
• USS Leary (DD-158) was a United States Navy Wickes-class destroyer during World War II
• USS Limestone (IX-158) was a United States Navy Trefoil-class concrete barge during World War II
• USS Newberry (APA-158) was a United States Navy Haskell-class attack transport during World War II
• USS Wadena (SP-158) was a United States Navy converted yacht patrol vessel during World War I

In music

• The song 158 by the Indie-rock band Blackbud
• The song "Here We Go" (1998) from The Bouncing Souls’ Tie One On CD includes the lyrics "Me, Shal Pete and Lamar thumbed down the ramp of Exit 158"

In transportation

• The Alfa Romeo 158 racecar
• The Ferrari 158 racecar produced between 1964 and 1965
• The British Rail Class 158 Express Sprinter is a diesel multiple unit (DMU) train, built for British Rail between 1989 and 1992

In other fields

158 is also:

• The year AD 158 or 158 BC
• One of a number of highways
• The atomic number of an element temporarily called unpentoctium.^[2]
• 158 Koronis is a Main belt asteroid
• In the Israeli satirical comedy Operation Grandma ("Mivtza Safta", מבצע סבתא), the number 158 is implied to be a classified high-rank officer position (Alon says: "Since you've became 158, you became all that?")
• Township 158-30 is a small township in Lake of the Woods County, Minnesota
• Edenwold No. 158, Saskatchewan is a rural municipality in Saskatchewan, Canada
• John Irving's third novel, The 158-Pound Marriage
• Financial Accounting Standards Board summary of statement No. 158 requires an employer to recognize the overfunded or underfunded status of a defined benefit postretirement plan