549041861 has 4 divisors (see below), whose sum is σ = 549247392. Its totient is φ = 548836332.

The previous prime is 549041851. The next prime is 549041873. The reversal of 549041861 is 168140945.

549041861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 549041861 - 2⁶ = 549041797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549041821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98705 + ... + 104118.

It is an arithmetic number, because the mean of its divisors is an integer number (137311848).

Almost surely, 2^549041861 is an apocalyptic number.

It is an amenable number.

549041861 is a deficient number, since it is larger than the sum of its proper divisors (205531).

549041861 is a wasteful number, since it uses less digits than its factorization.

549041861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205530.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 549041861 is about 23431.6423026641. The cubic root of 549041861 is about 818.8452221399.

It can be divided in two parts, 54904 and 1861, that added together give a palindrome (56765).

The spelling of 549041861 in words is "five hundred forty-nine million, forty-one thousand, eight hundred sixty-one".