545656549 has 2 divisors, whose sum is σ = 545656550. Its totient is φ = 545656548.

The previous prime is 545656543. The next prime is 545656567. The reversal of 545656549 is 945656545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 540562500 + 5094049 = 23250^2 + 2257^2 .

It is a cyclic number.

It is not a de Polignac number, because 545656549 - 2¹⁵ = 545623781 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545656543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272828274 + 272828275.

It is an arithmetic number, because the mean of its divisors is an integer number (272828275).

Almost surely, 2^545656549 is an apocalyptic number.

It is an amenable number.

545656549 is a deficient number, since it is larger than the sum of its proper divisors (1).

545656549 is an equidigital number, since it uses as much as digits as its factorization.

545656549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240000, while the sum is 49.

The square root of 545656549 is about 23359.2925620619. The cubic root of 545656549 is about 817.1587912285.

The spelling of 545656549 in words is "five hundred forty-five million, six hundred fifty-six thousand, five hundred forty-nine".