168252043726638 has 12 divisors (see below), whose sum is σ = 364546094741088. Its totient is φ = 56084014575540.

The previous prime is 168252043726621. The next prime is 168252043726703. The reversal of 168252043726638 is 836627340252861.

168252043726638 is a `hidden beast` number, since 1 + 6 + 8 + 2 + 520 + 4 + 3 + 72 + 6 + 6 + 38 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4673667881278 + ... + 4673667881313.

It is an arithmetic number, because the mean of its divisors is an integer number (30378841228424).

Almost surely, 2^{168252043726638} is an apocalyptic number.

168252043726638 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

168252043726638 is an abundant number, since it is smaller than the sum of its proper divisors (196294051014450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

168252043726638 is a wasteful number, since it uses less digits than its factorization.

168252043726638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9347335762599 (or 9347335762596 counting only the distinct ones).

The product of its (nonzero) digits is 139345920, while the sum is 63.

The spelling of 168252043726638 in words is "one hundred sixty-eight trillion, two hundred fifty-two billion, forty-three million, seven hundred twenty-six thousand, six hundred thirty-eight".