27450021265 has 4 divisors (see below), whose sum is σ = 32940025524. Its totient is φ = 21960017008.

The previous prime is 27450021211. The next prime is 27450021307. The reversal of 27450021265 is 56212005472.

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 4209933456 + 23240087809 = 64884^2 + 152447^2 .

It is a cyclic number.

It is not a de Polignac number, because 27450021265 - 2⁹ = 27450020753 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 27450021265.

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, 2745002122 + ... + 2745002131.

It is an arithmetic number, because the mean of its divisors is an integer number (8235006381).

Almost surely, 2^27450021265 is an apocalyptic number.

It is an amenable number.

27450021265 is a deficient number, since it is larger than the sum of its proper divisors (5490004259).

27450021265 is an equidigital number, since it uses as much as digits as its factorization.

27450021265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5490004258.

The product of its (nonzero) digits is 33600, while the sum is 34.

The spelling of 27450021265 in words is "twenty-seven billion, four hundred fifty million, twenty-one thousand, two hundred sixty-five".