167772180427 has 2 divisors, whose sum is σ = 167772180428. Its totient is φ = 167772180426.

The previous prime is 167772180299. The next prime is 167772180439. The reversal of 167772180427 is 724081277761.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 167772180427 - 2⁷ = 167772180299 is a prime.

It is not a weakly prime, because it can be changed into another prime (167772184427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83886090213 + 83886090214.

It is an arithmetic number, because the mean of its divisors is an integer number (83886090214).

Almost surely, 2^167772180427 is an apocalyptic number.

167772180427 is a deficient number, since it is larger than the sum of its proper divisors (1).

167772180427 is an equidigital number, since it uses as much as digits as its factorization.

167772180427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1843968, while the sum is 52.

The spelling of 167772180427 in words is "one hundred sixty-seven billion, seven hundred seventy-two million, one hundred eighty thousand, four hundred twenty-seven".