549155644 has 12 divisors (see below), whose sum is σ = 961357768. Its totient is φ = 274482000.

The previous prime is 549155609. The next prime is 549155653. The reversal of 549155644 is 446551945.

It is a self number, because there is not a number n which added to its sum of digits gives 549155644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10182 + ... + 34669.

Almost surely, 2^549155644 is an apocalyptic number.

It is an amenable number.

549155644 is a deficient number, since it is larger than the sum of its proper divisors (412202124).

549155644 is a wasteful number, since it uses less digits than its factorization.

549155644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47916 (or 47914 counting only the distinct ones).

The product of its digits is 432000, while the sum is 43.

The square root of 549155644 is about 23434.0701543714. The cubic root of 549155644 is about 818.9017838444.

The spelling of 549155644 in words is "five hundred forty-nine million, one hundred fifty-five thousand, six hundred forty-four".