549909185305 has 4 divisors (see below), whose sum is σ = 659891022372. Its totient is φ = 439927348240.

The previous prime is 549909185251. The next prime is 549909185333. The reversal of 549909185305 is 503581909945.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 121910610649 + 427998574656 = 349157^2 + 654216^2 .

It is a de Polignac number, because none of the positive numbers 2^k-549909185305 is a prime.

It is a super-2 number, since 2×549909185305² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 549909185305.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54990918526 + ... + 54990918535.

It is an arithmetic number, because the mean of its divisors is an integer number (164972755593).

Almost surely, 2^549909185305 is an apocalyptic number.

It is an amenable number.

549909185305 is a deficient number, since it is larger than the sum of its proper divisors (109981837067).

549909185305 is a wasteful number, since it uses less digits than its factorization.

549909185305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109981837066.

The product of its (nonzero) digits is 8748000, while the sum is 58.

The spelling of 549909185305 in words is "five hundred forty-nine billion, nine hundred nine million, one hundred eighty-five thousand, three hundred five".