5621505605 has 4 divisors (see below), whose sum is σ = 6745806732. Its totient is φ = 4497204480.

The previous prime is 5621505563. The next prime is 5621505619. The reversal of 5621505605 is 5065051265.

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 3084469444 + 2537036161 = 55538^2 + 50369^2 .

It is not a de Polignac number, because 5621505605 - 2²⁶ = 5554396741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 562150556 + ... + 562150565.

It is an arithmetic number, because the mean of its divisors is an integer number (1686451683).

Almost surely, 2^5621505605 is an apocalyptic number.

It is an amenable number.

5621505605 is a deficient number, since it is larger than the sum of its proper divisors (1124301127).

5621505605 is a wasteful number, since it uses less digits than its factorization.

5621505605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124301126.

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

The square root of 5621505605 is about 74976.7004141953. The cubic root of 5621505605 is about 1778.0783036570.

The spelling of 5621505605 in words is "five billion, six hundred twenty-one million, five hundred five thousand, six hundred five".