5806535521 has 4 divisors (see below), whose sum is σ = 6148096452. Its totient is φ = 5464974592.

The previous prime is 5806535491. The next prime is 5806535557. The reversal of 5806535521 is 1255356085.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1255356085 = 5 ⋅251071217.

It can be written as a sum of positive squares in 2 ways, for example, as 2604673296 + 3201862225 = 51036^2 + 56585^2 .

It is a cyclic number.

It is not a de Polignac number, because 5806535521 - 2¹⁵ = 5806502753 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5806535921) 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, 170780440 + ... + 170780473.

It is an arithmetic number, because the mean of its divisors is an integer number (1537024113).

Almost surely, 2^5806535521 is an apocalyptic number.

It is an amenable number.

5806535521 is a deficient number, since it is larger than the sum of its proper divisors (341560931).

5806535521 is a wasteful number, since it uses less digits than its factorization.

5806535521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341560930.

The product of its (nonzero) digits is 180000, while the sum is 40.

The square root of 5806535521 is about 76200.6267756375. The cubic root of 5806535521 is about 1797.3763753772.

The spelling of 5806535521 in words is "five billion, eight hundred six million, five hundred thirty-five thousand, five hundred twenty-one".