13812825085 has 4 divisors (see below), whose sum is σ = 16575390108. Its totient is φ = 11050260064.

The previous prime is 13812825083. The next prime is 13812825097. The reversal of 13812825085 is 58052821831.

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 2852200836 + 10960624249 = 53406^2 + 104693^2 .

It is a cyclic number.

It is not a de Polignac number, because 13812825085 - 2¹ = 13812825083 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13812825083) 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, 1381282504 + ... + 1381282513.

It is an arithmetic number, because the mean of its divisors is an integer number (4143847527).

Almost surely, 2^13812825085 is an apocalyptic number.

It is an amenable number.

13812825085 is a deficient number, since it is larger than the sum of its proper divisors (2762565023).

13812825085 is an equidigital number, since it uses as much as digits as its factorization.

13812825085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2762565022.

The product of its (nonzero) digits is 153600, while the sum is 43.

The spelling of 13812825085 in words is "thirteen billion, eight hundred twelve million, eight hundred twenty-five thousand, eighty-five".