27663241745 has 4 divisors (see below), whose sum is σ = 33195890100. Its totient is φ = 22130593392.

The previous prime is 27663241699. The next prime is 27663241769. The reversal of 27663241745 is 54714236672.

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 16729611649 + 10933630096 = 129343^2 + 104564^2 .

It is a cyclic number.

It is not a de Polignac number, because 27663241745 - 2⁶ = 27663241681 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27663241745.

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, 2766324170 + ... + 2766324179.

It is an arithmetic number, because the mean of its divisors is an integer number (8298972525).

Almost surely, 2^27663241745 is an apocalyptic number.

It is an amenable number.

27663241745 is a deficient number, since it is larger than the sum of its proper divisors (5532648355).

27663241745 is an equidigital number, since it uses as much as digits as its factorization.

27663241745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5532648354.

The product of its digits is 1693440, while the sum is 47.

The spelling of 27663241745 in words is "twenty-seven billion, six hundred sixty-three million, two hundred forty-one thousand, seven hundred forty-five".