549772525566 has 96 divisors (see below), whose sum is σ = 1331127323136. Its totient is φ = 162559584000.

The previous prime is 549772525543. The next prime is 549772525567. The reversal of 549772525566 is 665525277945.

549772525566 is a `hidden beast` number, since 5 + 4 + 9 + 7 + 72 + 5 + 2 + 556 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549772525567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2991046 + ... + 3169526.

It is an arithmetic number, because the mean of its divisors is an integer number (13865909616).

Almost surely, 2^549772525566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 549772525566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (665563661568).

549772525566 is an abundant number, since it is smaller than the sum of its proper divisors (781354797570).

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

549772525566 is a wasteful number, since it uses less digits than its factorization.

549772525566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178878 (or 178875 counting only the distinct ones).

The product of its digits is 158760000, while the sum is 63.

The spelling of 549772525566 in words is "five hundred forty-nine billion, seven hundred seventy-two million, five hundred twenty-five thousand, five hundred sixty-six".