5605505621 has 16 divisors (see below), whose sum is σ = 5851082304. Its totient is φ = 5366659584.

The previous prime is 5605505573. The next prime is 5605505639. The reversal of 5605505621 is 1265055065.

It is a de Polignac number, because none of the positive numbers 2^k-5605505621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5605505641) 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 15 ways as a sum of consecutive naturals, for example, 372581 + ... + 387333.

It is an arithmetic number, because the mean of its divisors is an integer number (365692644).

Almost surely, 2^5605505621 is an apocalyptic number.

It is an amenable number.

5605505621 is a deficient number, since it is larger than the sum of its proper divisors (245576683).

5605505621 is a wasteful number, since it uses less digits than its factorization.

5605505621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14980.

The product of its (nonzero) digits is 45000, while the sum is 35.

The square root of 5605505621 is about 74869.9246760674. The cubic root of 5605505621 is about 1776.3897727432.

The spelling of 5605505621 in words is "five billion, six hundred five million, five hundred five thousand, six hundred twenty-one".