545155549 has 4 divisors (see below), whose sum is σ = 545218236. Its totient is φ = 545092864.

The previous prime is 545155531. The next prime is 545155561. The reversal of 545155549 is 945551545.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 261468900 + 283686649 = 16170^2 + 16843^2 .

It is a cyclic number.

It is not a de Polignac number, because 545155549 - 2²⁹ = 8284637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545155519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15694 + ... + 36559.

It is an arithmetic number, because the mean of its divisors is an integer number (136304559).

Almost surely, 2^545155549 is an apocalyptic number.

It is an amenable number.

545155549 is a deficient number, since it is larger than the sum of its proper divisors (62687).

545155549 is a wasteful number, since it uses less digits than its factorization.

545155549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62686.

The product of its digits is 450000, while the sum is 43.

The square root of 545155549 is about 23348.5663157291. The cubic root of 545155549 is about 816.9086204838.

The spelling of 545155549 in words is "five hundred forty-five million, one hundred fifty-five thousand, five hundred forty-nine".