167638141997 has 2 divisors, whose sum is σ = 167638141998. Its totient is φ = 167638141996.

The previous prime is 167638141991. The next prime is 167638142029. The reversal of 167638141997 is 799141836761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163006795081 + 4631346916 = 403741^2 + 68054^2 .

It is a cyclic number.

It is not a de Polignac number, because 167638141997 - 2¹⁰ = 167638140973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (167638141991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83819070998 + 83819070999.

It is an arithmetic number, because the mean of its divisors is an integer number (83819070999).

Almost surely, 2^167638141997 is an apocalyptic number.

It is an amenable number.

167638141997 is a deficient number, since it is larger than the sum of its proper divisors (1).

167638141997 is an equidigital number, since it uses as much as digits as its factorization.

167638141997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13716864, while the sum is 62.

The spelling of 167638141997 in words is "one hundred sixty-seven billion, six hundred thirty-eight million, one hundred forty-one thousand, nine hundred ninety-seven".