27709193689 has 4 divisors (see below), whose sum is σ = 27968158224. Its totient is φ = 27450229156.

The previous prime is 27709193641. The next prime is 27709193717. The reversal of 27709193689 is 98639190772.

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 a cyclic number.

It is not a de Polignac number, because 27709193689 - 2⁹ = 27709193177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27709193389) 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, 129482107 + ... + 129482320.

It is an arithmetic number, because the mean of its divisors is an integer number (6992039556).

Almost surely, 2^27709193689 is an apocalyptic number.

It is an amenable number.

27709193689 is a deficient number, since it is larger than the sum of its proper divisors (258964535).

27709193689 is a wasteful number, since it uses less digits than its factorization.

27709193689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258964534.

The product of its (nonzero) digits is 10287648, while the sum is 61.

The spelling of 27709193689 in words is "twenty-seven billion, seven hundred nine million, one hundred ninety-three thousand, six hundred eighty-nine".