13561660543 has 16 divisors (see below), whose sum is σ = 14337809280. Its totient is φ = 12806470656.

The previous prime is 13561660523. The next prime is 13561660547. The reversal of 13561660543 is 34506616531.

13561660543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 13561660543 - 2⁹ = 13561660031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13561660496 and 13561660505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13561660547) 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 15 ways as a sum of consecutive naturals, for example, 2746705 + ... + 2751637.

It is an arithmetic number, because the mean of its divisors is an integer number (896113080).

Almost surely, 2^13561660543 is an apocalyptic number.

13561660543 is a deficient number, since it is larger than the sum of its proper divisors (776148737).

13561660543 is a wasteful number, since it uses less digits than its factorization.

13561660543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7026.

The product of its (nonzero) digits is 194400, while the sum is 40.

The spelling of 13561660543 in words is "thirteen billion, five hundred sixty-one million, six hundred sixty thousand, five hundred forty-three".