13155442556 has 12 divisors (see below), whose sum is σ = 23034342240. Its totient is φ = 6574201920.

The previous prime is 13155442519. The next prime is 13155442561. The reversal of 13155442556 is 65524455131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 871421 + ... + 886388.

It is an arithmetic number, because the mean of its divisors is an integer number (1919528520).

Almost surely, 2^13155442556 is an apocalyptic number.

It is an amenable number.

13155442556 is a deficient number, since it is larger than the sum of its proper divisors (9878899684).

13155442556 is a wasteful number, since it uses less digits than its factorization.

13155442556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1759684 (or 1759682 counting only the distinct ones).

The product of its digits is 360000, while the sum is 41.

Adding to 13155442556 its reverse (65524455131), we get a palindrome (78679897687).

The spelling of 13155442556 in words is "thirteen billion, one hundred fifty-five million, four hundred forty-two thousand, five hundred fifty-six".