168545861 has 8 divisors (see below), whose sum is σ = 185389248. Its totient is φ = 153222300.

The previous prime is 168545843. The next prime is 168545869.

168545861 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-168545861 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168545869) 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 7 ways as a sum of consecutive naturals, for example, 61985 + ... + 64646.

It is an arithmetic number, because the mean of its divisors is an integer number (23173656).

Almost surely, 2^168545861 is an apocalyptic number.

168545861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

168545861 is a deficient number, since it is larger than the sum of its proper divisors (16843387).

168545861 is an equidigital number, since it uses as much as digits as its factorization.

168545861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126664 (or 126642 counting only the distinct ones).

The product of its digits is 230400, while the sum is 44.

The square root of 168545861 is about 12982.5213652819. The cubic root of 168545861 is about 552.3818039170.

The spelling of 168545861 in words is "one hundred sixty-eight million, five hundred forty-five thousand, eight hundred sixty-one".