549805663 has 4 divisors (see below), whose sum is σ = 599788008. Its totient is φ = 499823320.

The previous prime is 549805649. The next prime is 549805691. The reversal of 549805663 is 366508945.

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

It is a cyclic number.

It is not a de Polignac number, because 549805663 - 2⁵ = 549805631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549805063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24991156 + ... + 24991177.

It is an arithmetic number, because the mean of its divisors is an integer number (149947002).

Almost surely, 2^549805663 is an apocalyptic number.

549805663 is a deficient number, since it is larger than the sum of its proper divisors (49982345).

549805663 is a wasteful number, since it uses less digits than its factorization.

549805663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49982344.

The product of its (nonzero) digits is 777600, while the sum is 46.

The square root of 549805663 is about 23447.9351542945. The cubic root of 549805663 is about 819.2247595734.

The spelling of 549805663 in words is "five hundred forty-nine million, eight hundred five thousand, six hundred sixty-three".