13522530661 has 4 divisors (see below), whose sum is σ = 13852348524. Its totient is φ = 13192712800.

The previous prime is 13522530631. The next prime is 13522530689. The reversal of 13522530661 is 16603522531.

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 960380100 + 12562150561 = 30990^2 + 112081^2 .

It is a cyclic number.

It is not a de Polignac number, because 13522530661 - 2⁷ = 13522530533 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 (13522530601) 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, 164908870 + ... + 164908951.

It is an arithmetic number, because the mean of its divisors is an integer number (3463087131).

Almost surely, 2^13522530661 is an apocalyptic number.

It is an amenable number.

13522530661 is a deficient number, since it is larger than the sum of its proper divisors (329817863).

13522530661 is an equidigital number, since it uses as much as digits as its factorization.

13522530661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329817862.

The product of its (nonzero) digits is 32400, while the sum is 34.

The spelling of 13522530661 in words is "thirteen billion, five hundred twenty-two million, five hundred thirty thousand, six hundred sixty-one".