168545520 has 240 divisors, whose sum is σ = 665394912. Its totient is φ = 37693440.

The previous prime is 168545479. The next prime is 168545521. The reversal of 168545520 is 25545861.

168545520 is a `hidden beast` number, since 1 + 68 + 545 + 52 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168545521) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 102142 + ... + 103778.

Almost surely, 2^168545520 is an apocalyptic number.

168545520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168545520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (332697456).

168545520 is an abundant number, since it is smaller than the sum of its proper divisors (496849392).

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

168545520 is a wasteful number, since it uses less digits than its factorization.

168545520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680 (or 1671 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The square root of 168545520 is about 12982.5082322331. The cubic root of 168545520 is about 552.3814313927.

The spelling of 168545520 in words is "one hundred sixty-eight million, five hundred forty-five thousand, five hundred twenty".