168133545 has 12 divisors (see below), whose sum is σ = 291431556. Its totient is φ = 89671200.

The previous prime is 168133541. The next prime is 168133573. The reversal of 168133545 is 545331861.

168133545 is a `hidden beast` number, since 1 + 6 + 81 + 33 + 545 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 107246736 + 60886809 = 10356^2 + 7803^2 .

It is not a de Polignac number, because 168133545 - 2² = 168133541 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (168133541) 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 11 ways as a sum of consecutive naturals, for example, 1868106 + ... + 1868195.

It is an arithmetic number, because the mean of its divisors is an integer number (24285963).

Almost surely, 2^168133545 is an apocalyptic number.

168133545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

168133545 is a deficient number, since it is larger than the sum of its proper divisors (123298011).

168133545 is a wasteful number, since it uses less digits than its factorization.

168133545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3736312 (or 3736309 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 168133545 is about 12966.6319836726. The cubic root of 168133545 is about 551.9310031121.

The spelling of 168133545 in words is "one hundred sixty-eight million, one hundred thirty-three thousand, five hundred forty-five".