55011105500 has 72 divisors (see below), whose sum is σ = 130097232720. Its totient is φ = 20311761600.

The previous prime is 55011105481. The next prime is 55011105529. The reversal of 55011105500 is 550111055.

It is a happy number.

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, 241010 + ... + 410009.

It is an arithmetic number, because the mean of its divisors is an integer number (1806906010).

Almost surely, 2^55011105500 is an apocalyptic number.

55011105500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55011105500 is an abundant number, since it is smaller than the sum of its proper divisors (75086127220).

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

55011105500 is a wasteful number, since it uses less digits than its factorization.

55011105500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651064 (or 651039 counting only the distinct ones).

The product of its (nonzero) digits is 625, while the sum is 23.

Adding to 55011105500 its reverse (550111055), we get a palindrome (55561216555).

55011105500 divided by its reverse (550111055) gives a square (100 = 10²).

The spelling of 55011105500 in words is "fifty-five billion, eleven million, one hundred five thousand, five hundred".