27897866589 has 16 divisors (see below), whose sum is σ = 37433964672. Its totient is φ = 18480503808.

The previous prime is 27897866551. The next prime is 27897866597. The reversal of 27897866589 is 98566879872.

It is not a de Polignac number, because 27897866589 - 2⁸ = 27897866333 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27897866589.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27897866189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 299437 + ... + 381389.

It is an arithmetic number, because the mean of its divisors is an integer number (2339622792).

Almost surely, 2^27897866589 is an apocalyptic number.

It is an amenable number.

27897866589 is a deficient number, since it is larger than the sum of its proper divisors (9536098083).

27897866589 is a wasteful number, since it uses less digits than its factorization.

27897866589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82676.

The product of its digits is 731566080, while the sum is 75.

The spelling of 27897866589 in words is "twenty-seven billion, eight hundred ninety-seven million, eight hundred sixty-six thousand, five hundred eighty-nine".