1010561005505 has 4 divisors (see below), whose sum is σ = 1212673206612. Its totient is φ = 808448804400.

The previous prime is 1010561005481. The next prime is 1010561005507. The reversal of 1010561005505 is 5055001650101.

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 805068329536 + 205492675969 = 897256^2 + 453313^2 .

It is not a de Polignac number, because 1010561005505 - 2¹² = 1010561001409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1010561005507) by changing a digit.

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, 101056100546 + ... + 101056100555.

It is an arithmetic number, because the mean of its divisors is an integer number (303168301653).

Almost surely, 2^{1010561005505} is an apocalyptic number.

It is an amenable number.

1010561005505 is a deficient number, since it is larger than the sum of its proper divisors (202112201107).

1010561005505 is an equidigital number, since it uses as much as digits as its factorization.

1010561005505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202112201106.

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

Adding to 1010561005505 its reverse (5055001650101), we get a palindrome (6065562655606).

The spelling of 1010561005505 in words is "one trillion, ten billion, five hundred sixty-one million, five thousand, five hundred five".