105506005555 has 4 divisors (see below), whose sum is σ = 126607206672. Its totient is φ = 84404804440.

The previous prime is 105506005499. The next prime is 105506005601. The reversal of 105506005555 is 555500605501.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 105506005555 - 2⁷ = 105506005427 is a prime.

It is a super-2 number, since 2×105506005555² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10550600551 + ... + 10550600560.

It is an arithmetic number, because the mean of its divisors is an integer number (31651801668).

Almost surely, 2^105506005555 is an apocalyptic number.

105506005555 is a deficient number, since it is larger than the sum of its proper divisors (21101201117).

105506005555 is an equidigital number, since it uses as much as digits as its factorization.

105506005555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21101201116.

The product of its (nonzero) digits is 93750, while the sum is 37.

The spelling of 105506005555 in words is "one hundred five billion, five hundred six million, five thousand, five hundred fifty-five".