56111155500 has 96 divisors (see below), whose sum is σ = 164982504960. Its totient is φ = 14817662400.

The previous prime is 56111155493. The next prime is 56111155501. The reversal of 56111155500 is 555111165.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (56111155501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27090 + ... + 336089.

It is an arithmetic number, because the mean of its divisors is an integer number (1718567760).

Almost surely, 2^56111155500 is an apocalyptic number.

56111155500 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 56111155500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82491252480).

56111155500 is an abundant number, since it is smaller than the sum of its proper divisors (108871349460).

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

56111155500 is a wasteful number, since it uses less digits than its factorization.

56111155500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363304 (or 363292 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 30.

Adding to 56111155500 its reverse (555111165), we get a palindrome (56666266665).

The spelling of 56111155500 in words is "fifty-six billion, one hundred eleven million, one hundred fifty-five thousand, five hundred".