27865256872 has 8 divisors (see below), whose sum is σ = 52247356650. Its totient is φ = 13932628432.

The previous prime is 27865256819. The next prime is 27865256893.

27865256872 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 14226287076 + 13638969796 = 119274^2 + 116786^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1741578547 + ... + 1741578562.

Almost surely, 2^27865256872 is an apocalyptic number.

It is an amenable number.

27865256872 is a deficient number, since it is larger than the sum of its proper divisors (24382099778).

27865256872 is a wasteful number, since it uses less digits than its factorization.

27865256872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3483157115 (or 3483157111 counting only the distinct ones).

The product of its digits is 22579200, while the sum is 58.

The spelling of 27865256872 in words is "twenty-seven billion, eight hundred sixty-five million, two hundred fifty-six thousand, eight hundred seventy-two".