27824880681 has 12 divisors (see below), whose sum is σ = 43283147908. Its totient is φ = 17123003424.

The previous prime is 27824880661. The next prime is 27824880689. The reversal of 27824880681 is 18608842872.

27824880681 is a `hidden beast` number, since 2 + 7 + 82 + 488 + 0 + 6 + 81 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5839405056 + 21985475625 = 76416^2 + 148275^2 .

It is not a de Polignac number, because 27824880681 - 2⁵ = 27824880649 is a prime.

It is a super-2 number, since 2×27824880681² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27824880689) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118909630 + ... + 118909863.

Almost surely, 2^27824880681 is an apocalyptic number.

It is an amenable number.

27824880681 is a deficient number, since it is larger than the sum of its proper divisors (15458267227).

27824880681 is a wasteful number, since it uses less digits than its factorization.

27824880681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237819512 (or 237819509 counting only the distinct ones).

The product of its (nonzero) digits is 2752512, while the sum is 54.

The spelling of 27824880681 in words is "twenty-seven billion, eight hundred twenty-four million, eight hundred eighty thousand, six hundred eighty-one".