549181964 has 6 divisors (see below), whose sum is σ = 961068444. Its totient is φ = 274590980.

The previous prime is 549181951. The next prime is 549181967. The reversal of 549181964 is 469181945.

It is not an unprimeable number, because it can be changed into a prime (549181967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68647742 + ... + 68647749.

It is an arithmetic number, because the mean of its divisors is an integer number (160178074).

Almost surely, 2^549181964 is an apocalyptic number.

It is an amenable number.

549181964 is a deficient number, since it is larger than the sum of its proper divisors (411886480).

549181964 is a wasteful number, since it uses less digits than its factorization.

549181964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137295495 (or 137295493 counting only the distinct ones).

The product of its digits is 311040, while the sum is 47.

The square root of 549181964 is about 23434.6317231571. The cubic root of 549181964 is about 818.9148664442.

The spelling of 549181964 in words is "five hundred forty-nine million, one hundred eighty-one thousand, nine hundred sixty-four".