5605605521 has 4 divisors (see below), whose sum is σ = 5606774052. Its totient is φ = 5604436992.

The previous prime is 5605605503. The next prime is 5605605529. The reversal of 5605605521 is 1255065065.

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 1950193921 + 3655411600 = 44161^2 + 60460^2 .

It is a cyclic number.

It is not a de Polignac number, because 5605605521 - 2¹⁴ = 5605589137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5605605529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 577040 + ... + 586673.

It is an arithmetic number, because the mean of its divisors is an integer number (1401693513).

Almost surely, 2^5605605521 is an apocalyptic number.

It is an amenable number.

5605605521 is a deficient number, since it is larger than the sum of its proper divisors (1168531).

5605605521 is a wasteful number, since it uses less digits than its factorization.

5605605521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1168530.

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

The square root of 5605605521 is about 74870.5918301705. The cubic root of 5605605521 is about 1776.4003254805.

The spelling of 5605605521 in words is "five billion, six hundred five million, six hundred five thousand, five hundred twenty-one".