13827590785 has 4 divisors (see below), whose sum is σ = 16593108948. Its totient is φ = 11062072624.

The previous prime is 13827590771. The next prime is 13827590789. The reversal of 13827590785 is 58709572831.

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 3313959489 + 10513631296 = 57567^2 + 102536^2 .

It is a cyclic number.

It is not a de Polignac number, because 13827590785 - 2²⁹ = 13290719873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13827590789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1382759074 + ... + 1382759083.

It is an arithmetic number, because the mean of its divisors is an integer number (4148277237).

Almost surely, 2^13827590785 is an apocalyptic number.

It is an amenable number.

13827590785 is a deficient number, since it is larger than the sum of its proper divisors (2765518163).

13827590785 is an equidigital number, since it uses as much as digits as its factorization.

13827590785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2765518162.

The product of its (nonzero) digits is 4233600, while the sum is 55.

The spelling of 13827590785 in words is "thirteen billion, eight hundred twenty-seven million, five hundred ninety thousand, seven hundred eighty-five".