545260561 has 2 divisors, whose sum is σ = 545260562. Its totient is φ = 545260560.

The previous prime is 545260553. The next prime is 545260589. The reversal of 545260561 is 165062545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 297355536 + 247905025 = 17244^2 + 15745^2 .

It is a cyclic number.

It is not a de Polignac number, because 545260561 - 2³ = 545260553 is a prime.

It is not a weakly prime, because it can be changed into another prime (545260531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272630280 + 272630281.

It is an arithmetic number, because the mean of its divisors is an integer number (272630281).

Almost surely, 2^545260561 is an apocalyptic number.

It is an amenable number.

545260561 is a deficient number, since it is larger than the sum of its proper divisors (1).

545260561 is an equidigital number, since it uses as much as digits as its factorization.

545260561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 545260561 is about 23350.8149964835. The cubic root of 545260561 is about 816.9610701627.

The spelling of 545260561 in words is "five hundred forty-five million, two hundred sixty thousand, five hundred sixty-one".