549811869049 has 3 divisors (see below), whose sum is σ = 549812610543. Its totient is φ = 549811127556.

The previous prime is 549811869023. The next prime is 549811869059. The reversal of 549811869049 is 940968118945.

The square root of 549811869049 is 741493.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 534119797225 + 15692071824 = 730835^2 + 125268^2 .

It is a de Polignac number, because none of the positive numbers 2^k-549811869049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (549811869059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 370747 + ... + 1112239.

It is an arithmetic number, because the mean of its divisors is an integer number (183270870181).

Almost surely, 2^549811869049 is an apocalyptic number.

549811869049 is the 741493-rd square number.

549811869049 is the 370747-th centered octagonal number.

It is an amenable number.

549811869049 is a deficient number, since it is larger than the sum of its proper divisors (741494).

549811869049 is an frugal number, since it uses more digits than its factorization.

549811869049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1482986 (or 741493 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 64.

Multiplying 549811869049 by its sum of digits (64), we get a square (35187959619136 = 5931944²).

The spelling of 549811869049 in words is "five hundred forty-nine billion, eight hundred eleven million, eight hundred sixty-nine thousand, forty-nine".