56520413209 has 8 divisors (see below), whose sum is σ = 61426562120. Its totient is φ = 51694039296.

The previous prime is 56520413167. The next prime is 56520413237. The reversal of 56520413209 is 90231402565.

It can be written as a sum of positive squares in 4 ways, for example, as 480267225 + 56040145984 = 21915^2 + 236728^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56520413209 - 2¹¹ = 56520411161 is a prime.

It is a super-2 number, since 2×56520413209² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56520413249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19942272 + ... + 19945105.

It is an arithmetic number, because the mean of its divisors is an integer number (7678320265).

Almost surely, 2^56520413209 is an apocalyptic number.

It is an amenable number.

56520413209 is a deficient number, since it is larger than the sum of its proper divisors (4906148911).

56520413209 is a wasteful number, since it uses less digits than its factorization.

56520413209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39887499.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 56520413209 in words is "fifty-six billion, five hundred twenty million, four hundred thirteen thousand, two hundred nine".