13566913455779 has 4 divisors (see below), whose sum is σ = 13603880522784. Its totient is φ = 13529946388776.

The previous prime is 13566913455773. The next prime is 13566913455817. The reversal of 13566913455779 is 97755431966531.

13566913455779 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 is a cyclic number.

It is not a de Polignac number, because 13566913455779 - 2³² = 13562618488483 is a prime.

It is a super-2 number, since 2×13566913455779² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13566913455773) 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, 18483532952 + ... + 18483533685.

It is an arithmetic number, because the mean of its divisors is an integer number (3400970130696).

Almost surely, 2^{13566913455779} is an apocalyptic number.

13566913455779 is a deficient number, since it is larger than the sum of its proper divisors (36967067005).

13566913455779 is an equidigital number, since it uses as much as digits as its factorization.

13566913455779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36967067004.

The product of its digits is 642978000, while the sum is 71.

The spelling of 13566913455779 in words is "thirteen trillion, five hundred sixty-six billion, nine hundred thirteen million, four hundred fifty-five thousand, seven hundred seventy-nine".