105605011055 has 4 divisors (see below), whose sum is σ = 126726013272. Its totient is φ = 84484008840.

The previous prime is 105605010983. The next prime is 105605011097. The reversal of 105605011055 is 550110506501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 550110506501 = 1061 ⋅518483041.

It is not a de Polignac number, because 105605011055 - 2³⁶ = 36885534319 is a prime.

It is a super-2 number, since 2×105605011055² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 10560501101 + ... + 10560501110.

It is an arithmetic number, because the mean of its divisors is an integer number (31681503318).

Almost surely, 2^105605011055 is an apocalyptic number.

105605011055 is a deficient number, since it is larger than the sum of its proper divisors (21121002217).

105605011055 is an equidigital number, since it uses as much as digits as its factorization.

105605011055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21121002216.

The product of its (nonzero) digits is 3750, while the sum is 29.

Adding to 105605011055 its reverse (550110506501), we get a palindrome (655715517556).

The spelling of 105605011055 in words is "one hundred five billion, six hundred five million, eleven thousand, fifty-five".