549042549 has 8 divisors (see below), whose sum is σ = 798607392. Its totient is φ = 332753040.

The previous prime is 549042509. The next prime is 549042551. The reversal of 549042549 is 945240945.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 549042549 - 2¹² = 549038453 is a prime.

It is a super-2 number, since 2×549042549² = 602895441224834802, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 549042549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549042509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8318794 + ... + 8318859.

It is an arithmetic number, because the mean of its divisors is an integer number (99825924).

Almost surely, 2^549042549 is an apocalyptic number.

It is an amenable number.

549042549 is a deficient number, since it is larger than the sum of its proper divisors (249564843).

549042549 is a wasteful number, since it uses less digits than its factorization.

549042549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16637667.

The product of its (nonzero) digits is 259200, while the sum is 42.

The square root of 549042549 is about 23431.6569836621. The cubic root of 549042549 is about 818.8455641692.

The spelling of 549042549 in words is "five hundred forty-nine million, forty-two thousand, five hundred forty-nine".