13523523256585 has 4 divisors (see below), whose sum is σ = 16228227907908. Its totient is φ = 10818818605264.

The previous prime is 13523523256571. The next prime is 13523523256631. The reversal of 13523523256585 is 58565232532531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5464238180041 + 8059285076544 = 2337571^2 + 2838888^2 .

It is a cyclic number.

It is not a de Polignac number, because 13523523256585 - 2¹⁵ = 13523523223817 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1352352325654 + ... + 1352352325663.

It is an arithmetic number, because the mean of its divisors is an integer number (4057056976977).

Almost surely, 2^{13523523256585} is an apocalyptic number.

It is an amenable number.

13523523256585 is a deficient number, since it is larger than the sum of its proper divisors (2704704651323).

13523523256585 is an equidigital number, since it uses as much as digits as its factorization.

13523523256585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2704704651322.

The product of its digits is 32400000, while the sum is 55.

The spelling of 13523523256585 in words is "thirteen trillion, five hundred twenty-three billion, five hundred twenty-three million, two hundred fifty-six thousand, five hundred eighty-five".