545145761 has 2 divisors, whose sum is σ = 545145762. Its totient is φ = 545145760.

The previous prime is 545145709. The next prime is 545145763. The reversal of 545145761 is 167541545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 385376161 + 159769600 = 19631^2 + 12640^2 .

It is a cyclic number.

It is not a de Polignac number, because 545145761 - 2¹⁰ = 545144737 is a prime.

Together with 545145763, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (545145763) 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, 272572880 + 272572881.

It is an arithmetic number, because the mean of its divisors is an integer number (272572881).

Almost surely, 2^545145761 is an apocalyptic number.

It is an amenable number.

545145761 is a deficient number, since it is larger than the sum of its proper divisors (1).

545145761 is an equidigital number, since it uses as much as digits as its factorization.

545145761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84000, while the sum is 38.

The square root of 545145761 is about 23348.3567087707. The cubic root of 545145761 is about 816.9037313903.

The spelling of 545145761 in words is "five hundred forty-five million, one hundred forty-five thousand, seven hundred sixty-one".