27752513065 has 4 divisors (see below), whose sum is σ = 33303015684. Its totient is φ = 22202010448.

The previous prime is 27752513053. The next prime is 27752513081. The reversal of 27752513065 is 56031525772.

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 12076471449 + 15676041616 = 109893^2 + 125204^2 .

It is a cyclic number.

It is not a de Polignac number, because 27752513065 - 2²⁵ = 27718958633 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, 2775251302 + ... + 2775251311.

It is an arithmetic number, because the mean of its divisors is an integer number (8325753921).

Almost surely, 2^27752513065 is an apocalyptic number.

It is an amenable number.

27752513065 is a deficient number, since it is larger than the sum of its proper divisors (5550502619).

27752513065 is an equidigital number, since it uses as much as digits as its factorization.

27752513065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5550502618.

The product of its (nonzero) digits is 441000, while the sum is 43.

The spelling of 27752513065 in words is "twenty-seven billion, seven hundred fifty-two million, five hundred thirteen thousand, sixty-five".