13656220064645 has 12 divisors (see below), whose sum is σ = 17295356826540. Its totient is φ = 10349977310784.

The previous prime is 13656220064609. The next prime is 13656220064653. The reversal of 13656220064645 is 54646002265631.

13656220064645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 6046395759364 + 7609824305281 = 2458942^2 + 2758591^2 .

It is not a de Polignac number, because 13656220064645 - 2⁶ = 13656220064581 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13656220064593 and 13656220064602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3782884640 + ... + 3782888249.

It is an arithmetic number, because the mean of its divisors is an integer number (1441279735545).

Almost surely, 2^{13656220064645} is an apocalyptic number.

It is an amenable number.

13656220064645 is a deficient number, since it is larger than the sum of its proper divisors (3639136761895).

13656220064645 is an equidigital number, since it uses as much as digits as its factorization.

13656220064645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7565772932 (or 7565772913 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 50.

The spelling of 13656220064645 in words is "thirteen trillion, six hundred fifty-six billion, two hundred twenty million, sixty-four thousand, six hundred forty-five".