167673212218 has 4 divisors (see below), whose sum is σ = 251509818330. Its totient is φ = 83836606108.

The previous prime is 167673212197. The next prime is 167673212251. The reversal of 167673212218 is 812212376761.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 139649447809 + 28023764409 = 373697^2 + 167403^2 .

It is a super-2 number, since 2×167673212218² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41918303053 + ... + 41918303056.

Almost surely, 2^167673212218 is an apocalyptic number.

167673212218 is a deficient number, since it is larger than the sum of its proper divisors (83836606112).

167673212218 is an equidigital number, since it uses as much as digits as its factorization.

167673212218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83836606111.

The product of its digits is 338688, while the sum is 46.

Adding to 167673212218 its reverse (812212376761), we get a palindrome (979885588979).

The spelling of 167673212218 in words is "one hundred sixty-seven billion, six hundred seventy-three million, two hundred twelve thousand, two hundred eighteen".