13612355585 has 4 divisors (see below), whose sum is σ = 16334826708. Its totient is φ = 10889884464.

The previous prime is 13612355567. The next prime is 13612355599. The reversal of 13612355585 is 58555321631.

It is a Cunningham number, because it is equal to 116672²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58555321631 = 113 ⋅518188687.

It can be written as a sum of positive squares in 2 ways, for example, as 4900560016 + 8711795569 = 70004^2 + 93337^2 .

It is a cyclic number.

It is not a de Polignac number, because 13612355585 - 2¹⁴ = 13612339201 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1361235554 + ... + 1361235563.

It is an arithmetic number, because the mean of its divisors is an integer number (4083706677).

Almost surely, 2^13612355585 is an apocalyptic number.

It is an amenable number.

13612355585 is a deficient number, since it is larger than the sum of its proper divisors (2722471123).

13612355585 is an equidigital number, since it uses as much as digits as its factorization.

13612355585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2722471122.

The product of its digits is 540000, while the sum is 44.

The spelling of 13612355585 in words is "thirteen billion, six hundred twelve million, three hundred fifty-five thousand, five hundred eighty-five".