105815041855 has 4 divisors (see below), whose sum is σ = 126978050232. Its totient is φ = 84652033480.

The previous prime is 105815041831. The next prime is 105815041877. The reversal of 105815041855 is 558140518501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 558140518501 = 5003 ⋅111561167.

It is not a de Polignac number, because 105815041855 - 2¹¹ = 105815039807 is a prime.

It is a super-2 number, since 2×105815041855² (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, 10581504181 + ... + 10581504190.

It is an arithmetic number, because the mean of its divisors is an integer number (31744512558).

Almost surely, 2^105815041855 is an apocalyptic number.

105815041855 is a deficient number, since it is larger than the sum of its proper divisors (21163008377).

105815041855 is an equidigital number, since it uses as much as digits as its factorization.

105815041855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21163008376.

The product of its (nonzero) digits is 160000, while the sum is 43.

The spelling of 105815041855 in words is "one hundred five billion, eight hundred fifteen million, forty-one thousand, eight hundred fifty-five".