168878516 has 6 divisors (see below), whose sum is σ = 295537410. Its totient is φ = 84439256.

The previous prime is 168878477. The next prime is 168878531. The reversal of 168878516 is 615878861.

It can be written as a sum of positive squares in only one way, i.e., 111936400 + 56942116 = 10580^2 + 7546^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 21109811 + ... + 21109818.

It is an arithmetic number, because the mean of its divisors is an integer number (49256235).

Almost surely, 2^168878516 is an apocalyptic number.

It is an amenable number.

168878516 is a deficient number, since it is larger than the sum of its proper divisors (126658894).

168878516 is a wasteful number, since it uses less digits than its factorization.

168878516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42219633 (or 42219631 counting only the distinct ones).

The product of its digits is 645120, while the sum is 50.

The square root of 168878516 is about 12995.3266984713. The cubic root of 168878516 is about 552.7449727521.

The spelling of 168878516 in words is "one hundred sixty-eight million, eight hundred seventy-eight thousand, five hundred sixteen".