27810815256 has 192 divisors, whose sum is σ = 87601413120. Its totient is φ = 7806481920.

The previous prime is 27810815251. The next prime is 27810815267. The reversal of 27810815256 is 65251801872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27810815251) 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 47 ways as a sum of consecutive naturals, for example, 10410801 + ... + 10413471.

It is an arithmetic number, because the mean of its divisors is an integer number (456257360).

Almost surely, 2^27810815256 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 27810815256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43800706560).

27810815256 is an abundant number, since it is smaller than the sum of its proper divisors (59790597864).

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

27810815256 is a wasteful number, since it uses less digits than its factorization.

27810815256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3046 (or 3039 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 45.

The spelling of 27810815256 in words is "twenty-seven billion, eight hundred ten million, eight hundred fifteen thousand, two hundred fifty-six".