27381642187 has 8 divisors (see below), whose sum is σ = 27672137696. Its totient is φ = 27091314432.

The previous prime is 27381642179. The next prime is 27381642191. The reversal of 27381642187 is 78124618372.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27381642187 - 2³ = 27381642179 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27381642187.

It is not an unprimeable number, because it can be changed into a prime (27381642287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301018 + ... + 381280.

It is an arithmetic number, because the mean of its divisors is an integer number (3459017212).

Almost surely, 2^27381642187 is an apocalyptic number.

27381642187 is a deficient number, since it is larger than the sum of its proper divisors (290495509).

27381642187 is an equidigital number, since it uses as much as digits as its factorization.

27381642187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83877.

The product of its digits is 903168, while the sum is 49.

The spelling of 27381642187 in words is "twenty-seven billion, three hundred eighty-one million, six hundred forty-two thousand, one hundred eighty-seven".