27643241385 has 48 divisors (see below), whose sum is σ = 50531906880. Its totient is φ = 14493142080.

The previous prime is 27643241377. The next prime is 27643241389. The reversal of 27643241385 is 58314234672.

27643241385 is a `hidden beast` number, since 27 + 6 + 4 + 3 + 241 + 385 = 666.

It is not a de Polignac number, because 27643241385 - 2³ = 27643241377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 27643241385.

It is not an unprimeable number, because it can be changed into a prime (27643241389) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 121126 + ... + 264495.

It is an arithmetic number, because the mean of its divisors is an integer number (1052748060).

Almost surely, 2^27643241385 is an apocalyptic number.

It is an amenable number.

27643241385 is a deficient number, since it is larger than the sum of its proper divisors (22888665495).

27643241385 is an equidigital number, since it uses as much as digits as its factorization.

27643241385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385700 (or 385688 counting only the distinct ones).

The product of its digits is 967680, while the sum is 45.

The spelling of 27643241385 in words is "twenty-seven billion, six hundred forty-three million, two hundred forty-one thousand, three hundred eighty-five".