27171002689 has 4 divisors (see below), whose sum is σ = 28352350656. Its totient is φ = 25989654724.

The previous prime is 27171002657. The next prime is 27171002693. The reversal of 27171002689 is 98620017172.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 27171002689 - 2⁵ = 27171002657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27171002609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 590673949 + ... + 590673994.

It is an arithmetic number, because the mean of its divisors is an integer number (7088087664).

Almost surely, 2^27171002689 is an apocalyptic number.

It is an amenable number.

27171002689 is a deficient number, since it is larger than the sum of its proper divisors (1181347967).

27171002689 is a wasteful number, since it uses less digits than its factorization.

27171002689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181347966.

The product of its (nonzero) digits is 84672, while the sum is 43.

The spelling of 27171002689 in words is "twenty-seven billion, one hundred seventy-one million, two thousand, six hundred eighty-nine".