56111011100 has 72 divisors (see below), whose sum is σ = 125176654848. Its totient is φ = 21821112000.

The previous prime is 56111011091. The next prime is 56111011141. The reversal of 56111011100 is 111011165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 670169 + ... + 749231.

Almost surely, 2^56111011100 is an apocalyptic number.

56111011100 is a gapful number since it is divisible by the number (50) 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 56111011100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62588327424).

56111011100 is an abundant number, since it is smaller than the sum of its proper divisors (69065643748).

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

56111011100 is a wasteful number, since it uses less digits than its factorization.

56111011100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79275 (or 79268 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 17.

Adding to 56111011100 its reverse (111011165), we get a palindrome (56222022265).

The spelling of 56111011100 in words is "fifty-six billion, one hundred eleven million, eleven thousand, one hundred".