105561011055 has 32 divisors (see below), whose sum is σ = 176038686720. Its totient is φ = 53954115840.

The previous prime is 105561011051. The next prime is 105561011069. The reversal of 105561011055 is 550110165501.

It is not a de Polignac number, because 105561011055 - 2² = 105561011051 is a prime.

It is a super-2 number, since 2×105561011055² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105561011051) 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, 1054110 + ... + 1149899.

It is an arithmetic number, because the mean of its divisors is an integer number (5501208960).

Almost surely, 2^105561011055 is an apocalyptic number.

105561011055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

105561011055 is a deficient number, since it is larger than the sum of its proper divisors (70477675665).

105561011055 is a wasteful number, since it uses less digits than its factorization.

105561011055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2204151.

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

Adding to 105561011055 its reverse (550110165501), we get a palindrome (655671176556).

The spelling of 105561011055 in words is "one hundred five billion, five hundred sixty-one million, eleven thousand, fifty-five".