27864185345 has 4 divisors (see below), whose sum is σ = 33437022420. Its totient is φ = 22291348272.

The previous prime is 27864185269. The next prime is 27864185369. The reversal of 27864185345 is 54358146872.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8762457664 + 19101727681 = 93608^2 + 138209^2 .

It is a cyclic number.

It is not a de Polignac number, because 27864185345 - 2¹⁶ = 27864119809 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, 2786418530 + ... + 2786418539.

It is an arithmetic number, because the mean of its divisors is an integer number (8359255605).

Almost surely, 2^27864185345 is an apocalyptic number.

It is an amenable number.

27864185345 is a deficient number, since it is larger than the sum of its proper divisors (5572837075).

27864185345 is an equidigital number, since it uses as much as digits as its factorization.

27864185345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5572837074.

The product of its digits is 6451200, while the sum is 53.

The spelling of 27864185345 in words is "twenty-seven billion, eight hundred sixty-four million, one hundred eighty-five thousand, three hundred forty-five".