13558919556 has 72 divisors (see below), whose sum is σ = 39633787200. Its totient is φ = 3575976768.

The previous prime is 13558919533. The next prime is 13558919581. The reversal of 13558919556 is 65591985531.

It is a junction number, because it is equal to n+sod(n) for n = 13558919496 and 13558919505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 879256 + ... + 894543.

Almost surely, 2^13558919556 is an apocalyptic number.

It is an amenable number.

13558919556 is an abundant number, since it is smaller than the sum of its proper divisors (26074867644).

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

13558919556 is a wasteful number, since it uses less digits than its factorization.

13558919556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1773833 (or 1773824 counting only the distinct ones).

The product of its digits is 7290000, while the sum is 57.

The spelling of 13558919556 in words is "thirteen billion, five hundred fifty-eight million, nine hundred nineteen thousand, five hundred fifty-six".