27496943872 has 54 divisors (see below), whose sum is σ = 55684253562. Its totient is φ = 13548957696.

The previous prime is 27496943867. The next prime is 27496943897. The reversal of 27496943872 is 27834969472.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 658640896 + 26838302976 = 25664^2 + 163824^2 .

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 27496943872.

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 5 ways as a sum of consecutive naturals, for example, 22667938 + ... + 22669150.

Almost surely, 2^27496943872 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 27496943872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27842126781).

27496943872 is an abundant number, since it is smaller than the sum of its proper divisors (28187309690).

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

27496943872 is an frugal number, since it uses more digits than its factorization.

27496943872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2515 (or 1288 counting only the distinct ones).

The product of its digits is 36578304, while the sum is 61.

The spelling of 27496943872 in words is "twenty-seven billion, four hundred ninety-six million, nine hundred forty-three thousand, eight hundred seventy-two".