27988251696 has 120 divisors (see below), whose sum is σ = 79143171120. Its totient is φ = 9232785408.

The previous prime is 27988251679. The next prime is 27988251737. The reversal of 27988251696 is 69615288972.

27988251696 is a `hidden beast` number, since 27 + 9 + 8 + 8 + 2 + 516 + 96 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6961975 + ... + 6965993.

It is an arithmetic number, because the mean of its divisors is an integer number (659526426).

Almost surely, 2^27988251696 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 27988251696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39571585560).

27988251696 is an abundant number, since it is smaller than the sum of its proper divisors (51154919424).

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

27988251696 is a wasteful number, since it uses less digits than its factorization.

27988251696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4523 (or 4514 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 63.

The spelling of 27988251696 in words is "twenty-seven billion, nine hundred eighty-eight million, two hundred fifty-one thousand, six hundred ninety-six".