1001055105605 has 4 divisors (see below), whose sum is σ = 1201266126732. Its totient is φ = 800844084480.

The previous prime is 1001055105601. The next prime is 1001055105641. The reversal of 1001055105605 is 5065015501001.

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 584382273601 + 416672832004 = 764449^2 + 645502^2 .

It is not a de Polignac number, because 1001055105605 - 2² = 1001055105601 is a prime.

It is a super-2 number, since 2×1001055105605² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001055105601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100105510556 + ... + 100105510565.

It is an arithmetic number, because the mean of its divisors is an integer number (300316531683).

Almost surely, 2^{1001055105605} is an apocalyptic number.

It is an amenable number.

1001055105605 is a deficient number, since it is larger than the sum of its proper divisors (200211021127).

1001055105605 is an equidigital number, since it uses as much as digits as its factorization.

1001055105605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200211021126.

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

The spelling of 1001055105605 in words is "one trillion, one billion, fifty-five million, one hundred five thousand, six hundred five".