168520545 has 24 divisors (see below), whose sum is σ = 292869096. Its totient is φ = 89641728.

The previous prime is 168520531. The next prime is 168520571. The reversal of 168520545 is 545025861.

168520545 is a `hidden beast` number, since 1 + 68 + 52 + 0 + 545 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 39992976 + 128527569 = 6324^2 + 11337^2 .

It is not a de Polignac number, because 168520545 - 2¹⁶ = 168455009 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 13149 + ... + 22581.

It is an arithmetic number, because the mean of its divisors is an integer number (12202879).

Almost surely, 2^168520545 is an apocalyptic number.

168520545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

168520545 is a deficient number, since it is larger than the sum of its proper divisors (124348551).

168520545 is a wasteful number, since it uses less digits than its factorization.

168520545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9841 (or 9838 counting only the distinct ones).

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

The square root of 168520545 is about 12981.5463254575. The cubic root of 168520545 is about 552.3541461669.

It can be divided in two parts, 16 and 8520545, that added together give a square (8520561 = 2919²).

The spelling of 168520545 in words is "one hundred sixty-eight million, five hundred twenty thousand, five hundred forty-five".