13805242556 has 72 divisors (see below), whose sum is σ = 28569996000. Its totient is φ = 5818753920.

The previous prime is 13805242501. The next prime is 13805242559. The reversal of 13805242556 is 65524250831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13805242559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7082270 + ... + 7084218.

It is an arithmetic number, because the mean of its divisors is an integer number (396805500).

Almost surely, 2^13805242556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13805242556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14284998000).

13805242556 is an abundant number, since it is smaller than the sum of its proper divisors (14764753444).

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

13805242556 is a wasteful number, since it uses less digits than its factorization.

13805242556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2547 (or 2538 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 41.

The spelling of 13805242556 in words is "thirteen billion, eight hundred five million, two hundred forty-two thousand, five hundred fifty-six".