27751163256 has 144 divisors (see below), whose sum is σ = 82422381600. Its totient is φ = 8405720064.

The previous prime is 27751163197. The next prime is 27751163257. The reversal of 27751163256 is 65236115772.

It is a happy number.

27751163256 is a `hidden beast` number, since 2 + 7 + 7 + 5 + 1 + 1 + 632 + 5 + 6 = 666.

It is a super-2 number, since 2×27751163256² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27751163257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1015905 + ... + 1042863.

It is an arithmetic number, because the mean of its divisors is an integer number (572377650).

Almost surely, 2^27751163256 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 27751163256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41211190800).

27751163256 is an abundant number, since it is smaller than the sum of its proper divisors (54671218344).

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

27751163256 is a wasteful number, since it uses less digits than its factorization.

27751163256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27046 (or 27010 counting only the distinct ones).

The product of its digits is 529200, while the sum is 45.

The spelling of 27751163256 in words is "twenty-seven billion, seven hundred fifty-one million, one hundred sixty-three thousand, two hundred fifty-six".