13656617656 has 64 divisors (see below), whose sum is σ = 28175247360. Its totient is φ = 6154176000.

The previous prime is 13656617647. The next prime is 13656617657. The reversal of 13656617656 is 65671665631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13656617657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5663091 + ... + 5665501.

It is an arithmetic number, because the mean of its divisors is an integer number (440238240).

Almost surely, 2^13656617656 is an apocalyptic number.

It is an amenable number.

13656617656 is an abundant number, since it is smaller than the sum of its proper divisors (14518629704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13656617656 is a wasteful number, since it uses less digits than its factorization.

13656617656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2956 (or 2952 counting only the distinct ones).

The product of its digits is 4082400, while the sum is 52.

The spelling of 13656617656 in words is "thirteen billion, six hundred fifty-six million, six hundred seventeen thousand, six hundred fifty-six".