549108945 has 72 divisors (see below), whose sum is σ = 1207889280. Its totient is φ = 228191040.

The previous prime is 549108853. The next prime is 549108947. The reversal of 549108945 is 549801945.

549108945 is a `hidden beast` number, since 549 + 10 + 8 + 94 + 5 = 666.

549108945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 549108945 - 2¹² = 549104849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 549108945.

It is not an unprimeable number, because it can be changed into a prime (549108947) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 12936 + ... + 35574.

It is an arithmetic number, because the mean of its divisors is an integer number (16776240).

Almost surely, 2^549108945 is an apocalyptic number.

549108945 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

549108945 is an abundant number, since it is smaller than the sum of its proper divisors (658780335).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

549108945 is a wasteful number, since it uses less digits than its factorization.

549108945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22675 (or 22665 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 549108945 is about 23433.0737420425. The cubic root of 549108945 is about 818.8785706449.

The spelling of 549108945 in words is "five hundred forty-nine million, one hundred eight thousand, nine hundred forty-five".