The pedestrian was pronounced dead at the scene of the crash, which happened at 01:35 BST on High Road, at the junction with Seven Sisters, in Tottenham.
His next of kin have been told, the Met said.
A 36-year-old man has been arrested on suspicion of failing to stop at the scene and causing death by dangerous driving.
He is in custody for questioning.
Road closures are in place and parts of the pavement between the High Road and Stonebridge Estate are also closed.

Robert White tried to make his pet cat Salem inhale drugs on 16 May, before he stubbed it out on the animal.
Birmingham Magistrates' Court heard the kitten suffered third-degree burns to 80% of its face, and after being taken to the vets he was put to sleep to prevent further suffering.
White, 38, of Rogerfield Road in Birmingham, was handed a four-month sentence suspended for 18 months.
He was also banned from owning pets for life, ordered to pay Â£350 costs and a Â£150 victim surcharge and will be made to attend a drug and alcohol rehabilitation course.
More on this and other stories from Birmingham and Black Country
RSPCA inspector Beth Boyd said the case was "one of the worst" she had investigated.
"I can't even think about what Salem must have gone through that night - he would have been in severe pain, as well as being very frightened," she said.
"At least now some justice has been done for him."

Rescuers were continuing to clear fallen rock to get to the area where the two missing miners were thought to have been working, officials said.
They were trapped 150m (490 feet) underground by a cave-in on Friday.
Chilean President Sebastian Pinera has offered his help, three days after the dramatic rescue of 33 miners in Chile.
Deputy Mining Minister Jorge Espinosa said the searchers had hopes of finding the two missing men alive.
"We hope to find the two other miners alive because they were in a spot that probably was not affected" by the cave-in, he told Associated Press news agency.
Mr Espinosa identified the two workers who had been confirmed dead as Walter Vera and Paul Aguirre. He said the two missing men were Pedro Mendoza and Angel Vera, Walter's brother.
President Rafael Correa promised to do "everything possible" to save them.
"God willing, we will find them alive."
The collapse at the Casa Negro gold, silver and copper mine, near the town of Portovelo, is thought to have been caused by a water leak which eroded structural supports.
A 70-year-old man has died in an apparent hit-and-run in north London.
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A kitten died after a man stubbed a joint out in its face, a court heard.
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Rescuers have found the bodies of two of four miners trapped underground in a gold mine in southern Ecuador.