168180641 has 2 divisors, whose sum is σ = 168180642. Its totient is φ = 168180640.

The previous prime is 168180619. The next prime is 168180689. The reversal of 168180641 is 146081861.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145902241 + 22278400 = 12079^2 + 4720^2 .

It is a cyclic number.

It is not a de Polignac number, because 168180641 - 2²⁶ = 101071777 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (168180601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84090320 + 84090321.

It is an arithmetic number, because the mean of its divisors is an integer number (84090321).

Almost surely, 2^168180641 is an apocalyptic number.

It is an amenable number.

168180641 is a deficient number, since it is larger than the sum of its proper divisors (1).

168180641 is an equidigital number, since it uses as much as digits as its factorization.

168180641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 168180641 is about 12968.4479025055. The cubic root of 168180641 is about 551.9825322222.

The spelling of 168180641 in words is "one hundred sixty-eight million, one hundred eighty thousand, six hundred forty-one".