5561331556 has 24 divisors (see below), whose sum is σ = 10864000224. Its totient is φ = 2469089280.

The previous prime is 5561331539. The next prime is 5561331569. The reversal of 5561331556 is 6551331655.

It is a happy number.

It is a super-3 number, since 3×5561331556³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1467805 + ... + 1471588.

It is an arithmetic number, because the mean of its divisors is an integer number (452666676).

Almost surely, 2^5561331556 is an apocalyptic number.

It is an amenable number.

5561331556 is a deficient number, since it is larger than the sum of its proper divisors (5302668668).

5561331556 is a wasteful number, since it uses less digits than its factorization.

5561331556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2939451 (or 2939449 counting only the distinct ones).

The product of its digits is 202500, while the sum is 40.

The square root of 5561331556 is about 74574.3357731063. The cubic root of 5561331556 is about 1771.7111943483.

Subtracting 5561331556 from its reverse (6551331655), we obtain a palindrome (990000099).

The spelling of 5561331556 in words is "five billion, five hundred sixty-one million, three hundred thirty-one thousand, five hundred fifty-six".