549639168 has 88 divisors (see below), whose sum is σ = 1577794848. Its totient is φ = 169107456.

The previous prime is 549639157. The next prime is 549639179. The reversal of 549639168 is 861936945.

It is an interprime number because it is at equal distance from previous prime (549639157) and next prime (549639179).

It is a self number, because there is not a number n which added to its sum of digits gives 549639168.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33055 + ... + 46817.

Almost surely, 2^549639168 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 549639168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (788897424).

549639168 is an abundant number, since it is smaller than the sum of its proper divisors (1028155680).

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

549639168 is a wasteful number, since it uses less digits than its factorization.

549639168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13799 (or 13781 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 51.

The square root of 549639168 is about 23444.3845728567. The cubic root of 549639168 is about 819.1420572624.

The spelling of 549639168 in words is "five hundred forty-nine million, six hundred thirty-nine thousand, one hundred sixty-eight".