27855917089 has 32 divisors (see below), whose sum is σ = 38196781056. Its totient is φ = 19609888320.

The previous prime is 27855917083. The next prime is 27855917107. The reversal of 27855917089 is 98071955872.

It is not a de Polignac number, because 27855917089 - 2⁹ = 27855916577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27855917083) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 248997 + ... + 343090.

It is an arithmetic number, because the mean of its divisors is an integer number (1193649408).

Almost surely, 2^27855917089 is an apocalyptic number.

It is an amenable number.

27855917089 is a deficient number, since it is larger than the sum of its proper divisors (10340863967).

27855917089 is a wasteful number, since it uses less digits than its factorization.

27855917089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592165.

The product of its (nonzero) digits is 12700800, while the sum is 61.

The spelling of 27855917089 in words is "twenty-seven billion, eight hundred fifty-five million, nine hundred seventeen thousand, eighty-nine".