11685854556 has 24 divisors (see below), whose sum is σ = 30296660240. Its totient is φ = 3895284816.

The previous prime is 11685854549. The next prime is 11685854569. The reversal of 11685854556 is 65545858611.

11685854556 is a `hidden beast` number, since 1 + 1 + 6 + 8 + 5 + 85 + 4 + 556 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54101071 + ... + 54101286.

Almost surely, 2^11685854556 is an apocalyptic number.

It is an amenable number.

11685854556 is an abundant number, since it is smaller than the sum of its proper divisors (18610805684).

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

11685854556 is a wasteful number, since it uses less digits than its factorization.

11685854556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108202370 (or 108202362 counting only the distinct ones).

The product of its digits is 5760000, while the sum is 54.

The spelling of 11685854556 in words is "eleven billion, six hundred eighty-five million, eight hundred fifty-four thousand, five hundred fifty-six".