27879897872 has 40 divisors (see below), whose sum is σ = 54692686944. Its totient is φ = 13765808384.

The previous prime is 27879897839. The next prime is 27879897889.

27879897872 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 27879897872.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4768583 + ... + 4774425.

Almost surely, 2^27879897872 is an apocalyptic number.

It is an amenable number.

27879897872 is a deficient number, since it is larger than the sum of its proper divisors (26812789072).

27879897872 is a wasteful number, since it uses less digits than its factorization.

27879897872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9527 (or 9521 counting only the distinct ones).

The product of its digits is 398297088, while the sum is 74.

The spelling of 27879897872 in words is "twenty-seven billion, eight hundred seventy-nine million, eight hundred ninety-seven thousand, eight hundred seventy-two".