27801845556 has 24 divisors (see below), whose sum is σ = 65110356864. Its totient is φ = 9233084160.

The previous prime is 27801845549. The next prime is 27801845557. The reversal of 27801845556 is 65554810872.

It is a junction number, because it is equal to n+sod(n) for n = 27801845499 and 27801845508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27801845557) 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, 4271325 + ... + 4277828.

It is an arithmetic number, because the mean of its divisors is an integer number (2712931536).

Almost surely, 2^27801845556 is an apocalyptic number.

It is an amenable number.

27801845556 is an abundant number, since it is smaller than the sum of its proper divisors (37308511308).

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

27801845556 is a wasteful number, since it uses less digits than its factorization.

27801845556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8549431 (or 8549429 counting only the distinct ones).

The product of its (nonzero) digits is 2688000, while the sum is 51.

The spelling of 27801845556 in words is "twenty-seven billion, eight hundred one million, eight hundred forty-five thousand, five hundred fifty-six".