27856265872 has 20 divisors (see below), whose sum is σ = 54004535676. Its totient is φ = 13919611520.

The previous prime is 27856265869. The next prime is 27856265873.

27856265872 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 3155742976 + 24700522896 = 56176^2 + 157164^2 .

It is not an unprimeable number, because it can be changed into a prime (27856265873) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 505579 + ... + 557962.

Almost surely, 2^27856265872 is an apocalyptic number.

It is an amenable number.

27856265872 is a deficient number, since it is larger than the sum of its proper divisors (26148269804).

27856265872 is a wasteful number, since it uses less digits than its factorization.

27856265872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065186 (or 1065180 counting only the distinct ones).

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

The spelling of 27856265872 in words is "twenty-seven billion, eight hundred fifty-six million, two hundred sixty-five thousand, eight hundred seventy-two".