5608821557 has 6 divisors (see below), whose sum is σ = 5658909282. Its totient is φ = 5559173312.

The previous prime is 5608821541. The next prime is 5608821583. The reversal of 5608821557 is 7551288065.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 318586801 + 5290234756 = 17849^2 + 72734^2 .

It is not a de Polignac number, because 5608821557 - 2⁴ = 5608821541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5608821857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 206858 + ... + 232395.

It is an arithmetic number, because the mean of its divisors is an integer number (943151547).

Almost surely, 2^5608821557 is an apocalyptic number.

It is an amenable number.

5608821557 is a deficient number, since it is larger than the sum of its proper divisors (50087725).

5608821557 is an equidigital number, since it uses as much as digits as its factorization.

5608821557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439479 (or 439366 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 47.

The square root of 5608821557 is about 74892.0660484140. The cubic root of 5608821557 is about 1776.7399780645.

The spelling of 5608821557 in words is "five billion, six hundred eight million, eight hundred twenty-one thousand, five hundred fifty-seven".