13522661857 has 4 divisors (see below), whose sum is σ = 13621367556. Its totient is φ = 13423956160.

The previous prime is 13522661851. The next prime is 13522661891. The reversal of 13522661857 is 75816622531.

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 10729645056 + 2793016801 = 103584^2 + 52849^2 .

It is a cyclic number.

It is not a de Polignac number, because 13522661857 - 2¹⁵ = 13522629089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13522661851) 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, 49352644 + ... + 49352917.

It is an arithmetic number, because the mean of its divisors is an integer number (3405341889).

Almost surely, 2^13522661857 is an apocalyptic number.

It is an amenable number.

13522661857 is a deficient number, since it is larger than the sum of its proper divisors (98705699).

13522661857 is an equidigital number, since it uses as much as digits as its factorization.

13522661857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98705698.

The product of its digits is 604800, while the sum is 46.

The spelling of 13522661857 in words is "thirteen billion, five hundred twenty-two million, six hundred sixty-one thousand, eight hundred fifty-seven".