549681216 has 84 divisors (see below), whose sum is σ = 1691841168. Its totient is φ = 157049088.

The previous prime is 549681203. The next prime is 549681227. The reversal of 549681216 is 612186945.

It is a tau number, because it is divible by the number of its divisors (84).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19806 + ... + 38621.

Almost surely, 2^549681216 is an apocalyptic number.

549681216 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

549681216 is an abundant number, since it is smaller than the sum of its proper divisors (1142159952).

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

549681216 is a wasteful number, since it uses less digits than its factorization.

549681216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58456 (or 58439 counting only the distinct ones).

The product of its digits is 103680, while the sum is 42.

The square root of 549681216 is about 23445.2813162905. The cubic root of 549681216 is about 819.1629451521.

The spelling of 549681216 in words is "five hundred forty-nine million, six hundred eighty-one thousand, two hundred sixteen".