549818194 has 4 divisors (see below), whose sum is σ = 824727294. Its totient is φ = 274909096.

The previous prime is 549818183. The next prime is 549818287. The reversal of 549818194 is 491818945.

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

It can be written as a sum of positive squares in only one way, i.e., 497067025 + 52751169 = 22295^2 + 7263^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137454547 + ... + 137454550.

Almost surely, 2^549818194 is an apocalyptic number.

549818194 is a deficient number, since it is larger than the sum of its proper divisors (274909100).

549818194 is a wasteful number, since it uses less digits than its factorization.

549818194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274909099.

The product of its digits is 414720, while the sum is 49.

The square root of 549818194 is about 23448.2023618016. The cubic root of 549818194 is about 819.2309833650.

The spelling of 549818194 in words is "five hundred forty-nine million, eight hundred eighteen thousand, one hundred ninety-four".