5605505505621 has 32 divisors (see below), whose sum is σ = 9990318924800. Its totient is φ = 3034559369520.

The previous prime is 5605505505581. The next prime is 5605505505623. The reversal of 5605505505621 is 1265055055065.

It is not a de Polignac number, because 5605505505621 - 2¹⁷ = 5605505374549 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5605505505623) 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 31 ways as a sum of consecutive naturals, for example, 780490075 + ... + 780497256.

It is an arithmetic number, because the mean of its divisors is an integer number (312197466400).

Almost surely, 2^{5605505505621} is an apocalyptic number.

It is an amenable number.

5605505505621 is a deficient number, since it is larger than the sum of its proper divisors (4384813419179).

5605505505621 is a wasteful number, since it uses less digits than its factorization.

5605505505621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1560987366 (or 1560987360 counting only the distinct ones).

The product of its (nonzero) digits is 1125000, while the sum is 45.

The spelling of 5605505505621 in words is "five trillion, six hundred five billion, five hundred five million, five hundred five thousand, six hundred twenty-one".