13565564256 has 48 divisors (see below), whose sum is σ = 37704293424. Its totient is φ = 4255862784.

The previous prime is 13565564251. The next prime is 13565564317. The reversal of 13565564256 is 65246556531.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13565564251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4154485 + ... + 4157748.

It is an arithmetic number, because the mean of its divisors is an integer number (785506113).

Almost surely, 2^13565564256 is an apocalyptic number.

13565564256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13565564256 is an abundant number, since it is smaller than the sum of its proper divisors (24138729168).

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

13565564256 is a wasteful number, since it uses less digits than its factorization.

13565564256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8312263 (or 8312255 counting only the distinct ones).

The product of its digits is 3240000, while the sum is 48.

The spelling of 13565564256 in words is "thirteen billion, five hundred sixty-five million, five hundred sixty-four thousand, two hundred fifty-six".