168716560 has 20 divisors (see below), whose sum is σ = 392266188. Its totient is φ = 67486592.

The previous prime is 168716557. The next prime is 168716591. The reversal of 168716560 is 65617861.

It can be written as a sum of positive squares in 2 ways, for example, as 99760144 + 68956416 = 9988^2 + 8304^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1054399 + ... + 1054558.

Almost surely, 2^168716560 is an apocalyptic number.

168716560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168716560 is an abundant number, since it is smaller than the sum of its proper divisors (223549628).

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

168716560 is a wasteful number, since it uses less digits than its factorization.

168716560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2108970 (or 2108964 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 168716560 is about 12989.0938867960. The cubic root of 168716560 is about 552.5682204548.

The spelling of 168716560 in words is "one hundred sixty-eight million, seven hundred sixteen thousand, five hundred sixty".