549494555841 has 81 divisors (see below), whose sum is σ = 1015183710723. Its totient is φ = 285362763840.

The previous prime is 549494555821. The next prime is 549494555849. The reversal of 549494555841 is 148555494945.

It is a happy number.

The square root of 549494555841 is 741279.

It is a perfect power (a square), and thus also a powerful number.

549494555841 is a `hidden beast` number, since 5 + 4 + 9 + 4 + 9 + 45 + 5 + 584 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 309668877441 + 239825678400 = 556479^2 + 489720^2 .

It is not a de Polignac number, because 549494555841 - 2¹¹ = 549494553793 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (549494555849) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 171233845 + ... + 171237053.

Almost surely, 2^549494555841 is an apocalyptic number.

549494555841 is the 741279-th square number.

549494555841 is the 370640-th centered octagonal number.

It is an amenable number.

549494555841 is a deficient number, since it is larger than the sum of its proper divisors (465689154882).

549494555841 is an equidigital number, since it uses as much as digits as its factorization.

549494555841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6460 (or 3230 counting only the distinct ones).

The product of its digits is 103680000, while the sum is 63.

The spelling of 549494555841 in words is "five hundred forty-nine billion, four hundred ninety-four million, five hundred fifty-five thousand, eight hundred forty-one".