5285856437509 has 2 divisors, whose sum is σ = 5285856437510. Its totient is φ = 5285856437508.

The previous prime is 5285856437503. The next prime is 5285856437527. The reversal of 5285856437509 is 9057346585825.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5199198030625 + 86658406884 = 2280175^2 + 294378^2 .

It is a cyclic number.

It is not a de Polignac number, because 5285856437509 - 2⁹ = 5285856436997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5285856437503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2642928218754 + 2642928218755.

It is an arithmetic number, because the mean of its divisors is an integer number (2642928218755).

Almost surely, 2^{5285856437509} is an apocalyptic number.

It is an amenable number.

5285856437509 is a deficient number, since it is larger than the sum of its proper divisors (1).

5285856437509 is an equidigital number, since it uses as much as digits as its factorization.

5285856437509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880000, while the sum is 67.

The spelling of 5285856437509 in words is "five trillion, two hundred eighty-five billion, eight hundred fifty-six million, four hundred thirty-seven thousand, five hundred nine".