13769656561 has 4 divisors (see below), whose sum is σ = 13780594800. Its totient is φ = 13758718324.

The previous prime is 13769656543. The next prime is 13769656567. The reversal of 13769656561 is 16565696731.

13769656561 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13769656561 - 2²⁹ = 13232785649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13769656567) 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, 5467231 + ... + 5469748.

It is an arithmetic number, because the mean of its divisors is an integer number (3445148700).

Almost surely, 2^13769656561 is an apocalyptic number.

It is an amenable number.

13769656561 is a deficient number, since it is larger than the sum of its proper divisors (10938239).

13769656561 is a wasteful number, since it uses less digits than its factorization.

13769656561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10938238.

The product of its digits is 6123600, while the sum is 55.

The spelling of 13769656561 in words is "thirteen billion, seven hundred sixty-nine million, six hundred fifty-six thousand, five hundred sixty-one".