5561208576 has 648 divisors, whose sum is σ = 21241444224. Its totient is φ = 1410877440.

The previous prime is 5561208563. The next prime is 5561208581. The reversal of 5561208576 is 6758021655.

5561208576 is a `hidden beast` number, since 5 + 56 + 1 + 20 + 8 + 576 = 666.

It is a tau number, because it is divible by the number of its divisors (648).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 129330411 + ... + 129330453.

Almost surely, 2^5561208576 is an apocalyptic number.

5561208576 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5561208576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10620722112).

5561208576 is an abundant number, since it is smaller than the sum of its proper divisors (15680235648).

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

5561208576 is an frugal number, since it uses more digits than its factorization.

5561208576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 45.

The square root of 5561208576 is about 74573.5112221491. The cubic root of 5561208576 is about 1771.6981347272.

The spelling of 5561208576 in words is "five billion, five hundred sixty-one million, two hundred eight thousand, five hundred seventy-six".