549821964 has 12 divisors (see below), whose sum is σ = 1282917944. Its totient is φ = 183273984.

The previous prime is 549821917. The next prime is 549821971. The reversal of 549821964 is 469128945.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22909237 + ... + 22909260.

Almost surely, 2^549821964 is an apocalyptic number.

It is an amenable number.

549821964 is an abundant number, since it is smaller than the sum of its proper divisors (733095980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

549821964 is a wasteful number, since it uses less digits than its factorization.

549821964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45818504 (or 45818502 counting only the distinct ones).

The product of its digits is 622080, while the sum is 48.

The square root of 549821964 is about 23448.2827516217. The cubic root of 549821964 is about 819.2328557983.

The spelling of 549821964 in words is "five hundred forty-nine million, eight hundred twenty-one thousand, nine hundred sixty-four".