549559505 has 16 divisors (see below), whose sum is σ = 719881344. Its totient is φ = 399425280.

The previous prime is 549559499. The next prime is 549559511. The reversal of 549559505 is 505955945.

It is an interprime number because it is at equal distance from previous prime (549559499) and next prime (549559511).

It is not a de Polignac number, because 549559505 - 2¹⁸ = 549297361 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 549559505.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154052 + ... + 157578.

It is an arithmetic number, because the mean of its divisors is an integer number (44992584).

Almost surely, 2^549559505 is an apocalyptic number.

549559505 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

549559505 is a deficient number, since it is larger than the sum of its proper divisors (170321839).

549559505 is a wasteful number, since it uses less digits than its factorization.

549559505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6376.

The product of its (nonzero) digits is 1012500, while the sum is 47.

The square root of 549559505 is about 23442.6855330186. The cubic root of 549559505 is about 819.1024807121.

It can be divided in two parts, 54 and 9559505, that added together give a palindrome (9559559).

The spelling of 549559505 in words is "five hundred forty-nine million, five hundred fifty-nine thousand, five hundred five".