105551055605 has 4 divisors (see below), whose sum is σ = 126661266732. Its totient is φ = 84440844480.

The previous prime is 105551055581. The next prime is 105551055611. The reversal of 105551055605 is 506550155501.

It is a happy number.

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 37279114084 + 68271941521 = 193078^2 + 261289^2 .

It is not a de Polignac number, because 105551055605 - 2⁸ = 105551055349 is a prime.

It is a super-2 number, since 2×105551055605² (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, 10555105556 + ... + 10555105565.

It is an arithmetic number, because the mean of its divisors is an integer number (31665316683).

Almost surely, 2^105551055605 is an apocalyptic number.

It is an amenable number.

105551055605 is a deficient number, since it is larger than the sum of its proper divisors (21110211127).

105551055605 is an equidigital number, since it uses as much as digits as its factorization.

105551055605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21110211126.

The product of its (nonzero) digits is 93750, while the sum is 38.

The spelling of 105551055605 in words is "one hundred five billion, five hundred fifty-one million, fifty-five thousand, six hundred five".