549969945 has 16 divisors (see below), whose sum is σ = 1005659520. Its totient is φ = 251414784.

The previous prime is 549969943. The next prime is 549969967.

549969945 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 549969945 - 2¹ = 549969943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (549969943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2618800 + ... + 2619009.

It is an arithmetic number, because the mean of its divisors is an integer number (62853720).

Almost surely, 2^549969945 is an apocalyptic number.

It is an amenable number.

549969945 is a deficient number, since it is larger than the sum of its proper divisors (455689575).

549969945 is a wasteful number, since it uses less digits than its factorization.

549969945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5237824.

The product of its digits is 15746400, while the sum is 60.

The square root of 549969945 is about 23451.4380156100. The cubic root of 549969945 is about 819.3063462677.

The spelling of 549969945 in words is "five hundred forty-nine million, nine hundred sixty-nine thousand, nine hundred forty-five".