549545945 has 8 divisors (see below), whose sum is σ = 710182536. Its totient is φ = 405818496.

The previous prime is 549545939. The next prime is 549545947.

It is a happy number.

549545945 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 23348224 + 526197721 = 4832^2 + 22939^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 549545945 - 2⁴ = 549545929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 549545893 and 549545902.

It is not an unprimeable number, because it can be changed into a prime (549545947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4227212 + ... + 4227341.

It is an arithmetic number, because the mean of its divisors is an integer number (88772817).

Almost surely, 2^549545945 is an apocalyptic number.

It is an amenable number.

549545945 is a deficient number, since it is larger than the sum of its proper divisors (160636591).

549545945 is a wasteful number, since it uses less digits than its factorization.

549545945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8454571.

The product of its digits is 3240000, while the sum is 50.

The square root of 549545945 is about 23442.3963152234. The cubic root of 549545945 is about 819.0957437280.

The spelling of 549545945 in words is "five hundred forty-nine million, five hundred forty-five thousand, nine hundred forty-five".