5561551111 has 8 divisors (see below), whose sum is σ = 5608403424. Its totient is φ = 5514885120.

The previous prime is 5561551097. The next prime is 5561551117. The reversal of 5561551111 is 1111551655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5561551111 - 2¹⁵ = 5561518343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5561551117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13695 + ... + 106351.

It is an arithmetic number, because the mean of its divisors is an integer number (701050428).

Almost surely, 2^5561551111 is an apocalyptic number.

5561551111 is a deficient number, since it is larger than the sum of its proper divisors (46852313).

5561551111 is a wasteful number, since it uses less digits than its factorization.

5561551111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93161.

The product of its digits is 3750, while the sum is 31.

The square root of 5561551111 is about 74575.8078132580. The cubic root of 5561551111 is about 1771.7345090844.

The spelling of 5561551111 in words is "five billion, five hundred sixty-one million, five hundred fifty-one thousand, one hundred eleven".