27189638195 has 4 divisors (see below), whose sum is σ = 32627565840. Its totient is φ = 21751710552.

The previous prime is 27189638183. The next prime is 27189638233. The reversal of 27189638195 is 59183698172.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27189638195 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2718963815 + ... + 2718963824.

It is an arithmetic number, because the mean of its divisors is an integer number (8156891460).

Almost surely, 2^27189638195 is an apocalyptic number.

27189638195 is a deficient number, since it is larger than the sum of its proper divisors (5437927645).

27189638195 is an equidigital number, since it uses as much as digits as its factorization.

27189638195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5437927644.

The product of its digits is 6531840, while the sum is 59.

The spelling of 27189638195 in words is "twenty-seven billion, one hundred eighty-nine million, six hundred thirty-eight thousand, one hundred ninety-five".