549857664 has 192 divisors, whose sum is σ = 1661212800. Its totient is φ = 174366720.

The previous prime is 549857657. The next prime is 549857717. The reversal of 549857664 is 466758945.

549857664 is a `hidden beast` number, since 5 + 4 + 9 + 8 + 576 + 64 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a self number, because there is not a number n which added to its sum of digits gives 549857664.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3178282 + ... + 3178454.

It is an arithmetic number, because the mean of its divisors is an integer number (8652150).

Almost surely, 2^549857664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 549857664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (830606400).

549857664 is an abundant number, since it is smaller than the sum of its proper divisors (1111355136).

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

549857664 is a wasteful number, since it uses less digits than its factorization.

549857664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 298 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 54.

The square root of 549857664 is about 23449.0439890414. The cubic root of 549857664 is about 819.2505863741.

The spelling of 549857664 in words is "five hundred forty-nine million, eight hundred fifty-seven thousand, six hundred sixty-four".