168558961 has 6 divisors (see below), whose sum is σ = 179057750. Its totient is φ = 158643456.

The previous prime is 168558959. The next prime is 168558983. The reversal of 168558961 is 169855861.

It can be written as a sum of positive squares in 3 ways, for example, as 96648561 + 71910400 = 9831^2 + 8480^2 .

It is not a de Polignac number, because 168558961 - 2¹ = 168558959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168558911) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 291336 + ... + 291913.

Almost surely, 2^168558961 is an apocalyptic number.

It is an amenable number.

168558961 is a deficient number, since it is larger than the sum of its proper divisors (10498789).

168558961 is an equidigital number, since it uses as much as digits as its factorization.

168558961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583283 (or 583266 counting only the distinct ones).

The product of its digits is 518400, while the sum is 49.

The square root of 168558961 is about 12983.0258799711. The cubic root of 168558961 is about 552.3961145902.

The spelling of 168558961 in words is "one hundred sixty-eight million, five hundred fifty-eight thousand, nine hundred sixty-one".