13806898561 has 4 divisors (see below), whose sum is σ = 13851010372. Its totient is φ = 13762786752.

The previous prime is 13806898487. The next prime is 13806898583. The reversal of 13806898561 is 16589860831.

13806898561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 842798961 + 12964099600 = 29031^2 + 113860^2 .

It is a cyclic number.

It is not a de Polignac number, because 13806898561 - 2¹¹ = 13806896513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13806898591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22055436 + ... + 22056061.

It is an arithmetic number, because the mean of its divisors is an integer number (3462752593).

Almost surely, 2^13806898561 is an apocalyptic number.

It is an amenable number.

13806898561 is a deficient number, since it is larger than the sum of its proper divisors (44111811).

13806898561 is an equidigital number, since it uses as much as digits as its factorization.

13806898561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44111810.

The product of its (nonzero) digits is 2488320, while the sum is 55.

The spelling of 13806898561 in words is "thirteen billion, eight hundred six million, eight hundred ninety-eight thousand, five hundred sixty-one".