549408663 has 14 divisors (see below), whose sum is σ = 823737264. Its totient is φ = 366271956.

The previous prime is 549408637. The next prime is 549408701. The reversal of 549408663 is 366804945.

549408663 is a `hidden beast` number, since 549 + 40 + 8 + 6 + 63 = 666.

It is not a de Polignac number, because 549408663 - 2⁵ = 549408631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549408163) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 376095 + ... + 377552.

It is an arithmetic number, because the mean of its divisors is an integer number (58838376).

Almost surely, 2^549408663 is an apocalyptic number.

549408663 is a deficient number, since it is larger than the sum of its proper divisors (274328601).

549408663 is an frugal number, since it uses more digits than its factorization.

549408663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753665 (or 753650 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The square root of 549408663 is about 23439.4680613703. The cubic root of 549408663 is about 819.0275319811.

The spelling of 549408663 in words is "five hundred forty-nine million, four hundred eight thousand, six hundred sixty-three".