56111105100 has 72 divisors (see below), whose sum is σ = 165802387968. Its totient is φ = 14644596800.

The previous prime is 56111105093. The next prime is 56111105107. The reversal of 56111105100 is 150111165.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (56111105093) and next prime (56111105107).

It is a super-2 number, since 2×56111105100² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56111105107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1975656 + ... + 2003855.

It is an arithmetic number, because the mean of its divisors is an integer number (2302810944).

Almost surely, 2^56111105100 is an apocalyptic number.

56111105100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

56111105100 is an abundant number, since it is smaller than the sum of its proper divisors (109691282868).

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

56111105100 is a wasteful number, since it uses less digits than its factorization.

56111105100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3979575 (or 3979568 counting only the distinct ones).

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

Adding to 56111105100 its reverse (150111165), we get a palindrome (56261216265).

The spelling of 56111105100 in words is "fifty-six billion, one hundred eleven million, one hundred five thousand, one hundred".