168686648 has 64 divisors (see below), whose sum is σ = 365873760. Its totient is φ = 72216576.

The previous prime is 168686633. The next prime is 168686653. The reversal of 168686648 is 846686861.

It is a self number, because there is not a number n which added to its sum of digits gives 168686648.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 128411 + ... + 129717.

Almost surely, 2^168686648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168686648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182936880).

168686648 is an abundant number, since it is smaller than the sum of its proper divisors (197187112).

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

168686648 is a wasteful number, since it uses less digits than its factorization.

168686648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1416 (or 1412 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 53.

The square root of 168686648 is about 12987.9424082493. The cubic root of 168686648 is about 552.5355633217.

The spelling of 168686648 in words is "one hundred sixty-eight million, six hundred eighty-six thousand, six hundred forty-eight".