105505560505 has 4 divisors (see below), whose sum is σ = 126606672612. Its totient is φ = 84404448400.

The previous prime is 105505560491. The next prime is 105505560521. The reversal of 105505560505 is 505065505501.

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

It can be written as a sum of positive squares in 2 ways, for example, as 48352051881 + 57153508624 = 219891^2 + 239068^2 .

It is a de Polignac number, because none of the positive numbers 2^k-105505560505 is a prime.

It is a super-2 number, since 2×105505560505² (a number of 23 digits) contains 22 as substring.

It is a Duffinian 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, 10550556046 + ... + 10550556055.

It is an arithmetic number, because the mean of its divisors is an integer number (31651668153).

Almost surely, 2^105505560505 is an apocalyptic number.

It is an amenable number.

105505560505 is a deficient number, since it is larger than the sum of its proper divisors (21101112107).

105505560505 is an equidigital number, since it uses as much as digits as its factorization.

105505560505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21101112106.

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

The spelling of 105505560505 in words is "one hundred five billion, five hundred five million, five hundred sixty thousand, five hundred five".