168986506 has 16 divisors (see below), whose sum is σ = 276270624. Its totient is φ = 77053104.

The previous prime is 168986483. The next prime is 168986507. The reversal of 168986506 is 605689861.

It is a self number, because there is not a number n which added to its sum of digits gives 168986506.

It is not an unprimeable number, because it can be changed into a prime (168986507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36996 + ... + 41311.

It is an arithmetic number, because the mean of its divisors is an integer number (17266914).

Almost surely, 2^168986506 is an apocalyptic number.

168986506 is a deficient number, since it is larger than the sum of its proper divisors (107284118).

168986506 is a wasteful number, since it uses less digits than its factorization.

168986506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78405.

The product of its (nonzero) digits is 622080, while the sum is 49.

The square root of 168986506 is about 12999.4809896395. The cubic root of 168986506 is about 552.8627659294.

The spelling of 168986506 in words is "one hundred sixty-eight million, nine hundred eighty-six thousand, five hundred six".