27963963505 has 4 divisors (see below), whose sum is σ = 33556756212. Its totient is φ = 22371170800.

The previous prime is 27963963499. The next prime is 27963963551. The reversal of 27963963505 is 50536936972.

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 7471182096 + 20492781409 = 86436^2 + 143153^2 .

It is not a de Polignac number, because 27963963505 - 2²¹ = 27961866353 is a prime.

It is a Duffinian number.

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, 2796396346 + ... + 2796396355.

It is an arithmetic number, because the mean of its divisors is an integer number (8389189053).

Almost surely, 2^27963963505 is an apocalyptic number.

It is an amenable number.

27963963505 is a deficient number, since it is larger than the sum of its proper divisors (5592792707).

27963963505 is an equidigital number, since it uses as much as digits as its factorization.

27963963505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5592792706.

The product of its (nonzero) digits is 9185400, while the sum is 55.

The spelling of 27963963505 in words is "twenty-seven billion, nine hundred sixty-three million, nine hundred sixty-three thousand, five hundred five".