546566561 has 2 divisors, whose sum is σ = 546566562. Its totient is φ = 546566560.

The previous prime is 546566557. The next prime is 546566623. The reversal of 546566561 is 165665645.

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., 544989025 + 1577536 = 23345^2 + 1256^2 .

It is a cyclic number.

It is not a de Polignac number, because 546566561 - 2² = 546566557 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (546562561) 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 as a sum of consecutive naturals, namely, 273283280 + 273283281.

It is an arithmetic number, because the mean of its divisors is an integer number (273283281).

Almost surely, 2^546566561 is an apocalyptic number.

It is an amenable number.

546566561 is a deficient number, since it is larger than the sum of its proper divisors (1).

546566561 is an equidigital number, since it uses as much as digits as its factorization.

546566561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648000, while the sum is 44.

The square root of 546566561 is about 23378.7630340016. The cubic root of 546566561 is about 817.6128077704.

The spelling of 546566561 in words is "five hundred forty-six million, five hundred sixty-six thousand, five hundred sixty-one".