105551123055 has 64 divisors (see below), whose sum is σ = 196608522240. Its totient is φ = 47360065536.

The previous prime is 105551123023. The next prime is 105551123059. The reversal of 105551123055 is 550321155501.

It is not a de Polignac number, because 105551123055 - 2⁵ = 105551123023 is a prime.

It is a super-2 number, since 2×105551123055² (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 (105551123059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1178911 + ... + 1265279.

It is an arithmetic number, because the mean of its divisors is an integer number (3072008160).

Almost surely, 2^105551123055 is an apocalyptic number.

105551123055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

105551123055 is a deficient number, since it is larger than the sum of its proper divisors (91057399185).

105551123055 is a wasteful number, since it uses less digits than its factorization.

105551123055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86600.

The product of its (nonzero) digits is 18750, while the sum is 33.

Adding to 105551123055 its reverse (550321155501), we get a palindrome (655872278556).

The spelling of 105551123055 in words is "one hundred five billion, five hundred fifty-one million, one hundred twenty-three thousand, fifty-five".