561448163 has 2 divisors, whose sum is σ = 561448164. Its totient is φ = 561448162.

The previous prime is 561448127. The next prime is 561448169. The reversal of 561448163 is 361844165.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 561448163 - 2²² = 557253859 is a prime.

It is not a weakly prime, because it can be changed into another prime (561448169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280724081 + 280724082.

It is an arithmetic number, because the mean of its divisors is an integer number (280724082).

Almost surely, 2^561448163 is an apocalyptic number.

561448163 is a deficient number, since it is larger than the sum of its proper divisors (1).

561448163 is an equidigital number, since it uses as much as digits as its factorization.

561448163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 38.

The square root of 561448163 is about 23694.8974042936. The cubic root of 561448163 is about 824.9669594359.

The spelling of 561448163 in words is "five hundred sixty-one million, four hundred forty-eight thousand, one hundred sixty-three".