162416561 has 2 divisors, whose sum is σ = 162416562. Its totient is φ = 162416560.

The previous prime is 162416543. The next prime is 162416567. The reversal of 162416561 is 165614261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126787600 + 35628961 = 11260^2 + 5969^2 .

It is a cyclic number.

It is not a de Polignac number, because 162416561 - 2¹⁰ = 162415537 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (162416567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81208280 + 81208281.

It is an arithmetic number, because the mean of its divisors is an integer number (81208281).

Almost surely, 2^162416561 is an apocalyptic number.

It is an amenable number.

162416561 is a deficient number, since it is larger than the sum of its proper divisors (1).

162416561 is an equidigital number, since it uses as much as digits as its factorization.

162416561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 32.

The square root of 162416561 is about 12744.2756169192. The cubic root of 162416561 is about 545.6030258161.

The spelling of 162416561 in words is "one hundred sixty-two million, four hundred sixteen thousand, five hundred sixty-one".