27797998688 has 48 divisors (see below), whose sum is σ = 56309695344. Its totient is φ = 13500119040.

The previous prime is 27797998619. The next prime is 27797998777. The reversal of 27797998688 is 88689979772.

It is a happy number.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 251156 + ... + 344492.

It is an arithmetic number, because the mean of its divisors is an integer number (1173118653).

Almost surely, 2^27797998688 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 27797998688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28154847672).

27797998688 is an abundant number, since it is smaller than the sum of its proper divisors (28511696656).

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

27797998688 is a wasteful number, since it uses less digits than its factorization.

27797998688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93615 (or 93607 counting only the distinct ones).

The product of its digits is 1536288768, while the sum is 80.

The spelling of 27797998688 in words is "twenty-seven billion, seven hundred ninety-seven million, nine hundred ninety-eight thousand, six hundred eighty-eight".