549777828864 has 176 divisors, whose sum is σ = 1616543084160. Its totient is φ = 164726538240.

The previous prime is 549777828841. The next prime is 549777828871. The reversal of 549777828864 is 468828777945.

It is a tau number, because it is divible by the number of its divisors (176).

It is a super-2 number, since 2×549777828864² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2916087 + ... + 3098889.

Almost surely, 2^549777828864 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 549777828864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (808271542080).

549777828864 is an abundant number, since it is smaller than the sum of its proper divisors (1066765255296).

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

549777828864 is a wasteful number, since it uses less digits than its factorization.

549777828864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182926 (or 182908 counting only the distinct ones).

The product of its digits is 1517322240, while the sum is 75.

The spelling of 549777828864 in words is "five hundred forty-nine billion, seven hundred seventy-seven million, eight hundred twenty-eight thousand, eight hundred sixty-four".