56575473509 has 2 divisors, whose sum is σ = 56575473510. Its totient is φ = 56575473508.

The previous prime is 56575473497. The next prime is 56575473517. The reversal of 56575473509 is 90537457565.

56575473509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47622150625 + 8953322884 = 218225^2 + 94622^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56575473509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56575473589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28287736754 + 28287736755.

It is an arithmetic number, because the mean of its divisors is an integer number (28287736755).

Almost surely, 2^56575473509 is an apocalyptic number.

It is an amenable number.

56575473509 is a deficient number, since it is larger than the sum of its proper divisors (1).

56575473509 is an equidigital number, since it uses as much as digits as its factorization.

56575473509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19845000, while the sum is 56.

The spelling of 56575473509 in words is "fifty-six billion, five hundred seventy-five million, four hundred seventy-three thousand, five hundred nine".