5561111100 has 72 divisors (see below), whose sum is σ = 16525049968. Its totient is φ = 1442880000.

The previous prime is 5561111093. The next prime is 5561111113. The reversal of 5561111100 is 11111655.

It is a happy number.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 239401 + ... + 261600.

Almost surely, 2^5561111100 is an apocalyptic number.

5561111100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

5561111100 is an abundant number, since it is smaller than the sum of its proper divisors (10963938868).

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

5561111100 is a wasteful number, since it uses less digits than its factorization.

5561111100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501055 (or 501048 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 21.

The square root of 5561111100 is about 74572.8576628253. The cubic root of 5561111100 is about 1771.6877833168.

Adding to 5561111100 its reverse (11111655), we get a palindrome (5572222755).

The spelling of 5561111100 in words is "five billion, five hundred sixty-one million, one hundred eleven thousand, one hundred".