549865617 has 16 divisors (see below), whose sum is σ = 845724672. Its totient is φ = 311271120.

The previous prime is 549865597. The next prime is 549865709. The reversal of 549865617 is 716568945.

It is not a de Polignac number, because 549865617 - 2¹⁰ = 549864593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 549865617.

It is not an unprimeable number, because it can be changed into a prime (549865417) 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, 120109 + ... + 124602.

It is an arithmetic number, because the mean of its divisors is an integer number (52857792).

Almost surely, 2^549865617 is an apocalyptic number.

It is an amenable number.

549865617 is a deficient number, since it is larger than the sum of its proper divisors (295859055).

549865617 is a wasteful number, since it uses less digits than its factorization.

549865617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244828.

The product of its digits is 1814400, while the sum is 51.

The square root of 549865617 is about 23449.2135689025. The cubic root of 549865617 is about 819.2545361650.

The spelling of 549865617 in words is "five hundred forty-nine million, eight hundred sixty-five thousand, six hundred seventeen".