168622418 has 4 divisors (see below), whose sum is σ = 252933630. Its totient is φ = 84311208.

The previous prime is 168622411. The next prime is 168622457. The reversal of 168622418 is 814226861.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 814226861 = 7 ⋅116318123.

It can be written as a sum of positive squares in only one way, i.e., 87928129 + 80694289 = 9377^2 + 8983^2 .

It is not an unprimeable number, because it can be changed into a prime (168622411) 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, 42155603 + ... + 42155606.

Almost surely, 2^168622418 is an apocalyptic number.

168622418 is a deficient number, since it is larger than the sum of its proper divisors (84311212).

168622418 is an equidigital number, since it uses as much as digits as its factorization.

168622418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84311211.

The product of its digits is 36864, while the sum is 38.

The square root of 168622418 is about 12985.4694947853. The cubic root of 168622418 is about 552.4654256532.

The spelling of 168622418 in words is "one hundred sixty-eight million, six hundred twenty-two thousand, four hundred eighteen".