27760357505 has 4 divisors (see below), whose sum is σ = 33312429012. Its totient is φ = 22208286000.

The previous prime is 27760357463. The next prime is 27760357507. The reversal of 27760357505 is 50575306772.

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 5534318449 + 22226039056 = 74393^2 + 149084^2 .

It is not a de Polignac number, because 27760357505 - 2¹⁴ = 27760341121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 27760357505.

It is not an unprimeable number, because it can be changed into a prime (27760357507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2776035746 + ... + 2776035755.

It is an arithmetic number, because the mean of its divisors is an integer number (8328107253).

Almost surely, 2^27760357505 is an apocalyptic number.

It is an amenable number.

27760357505 is a deficient number, since it is larger than the sum of its proper divisors (5552071507).

27760357505 is an equidigital number, since it uses as much as digits as its factorization.

27760357505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5552071506.

The product of its (nonzero) digits is 1543500, while the sum is 47.

The spelling of 27760357505 in words is "twenty-seven billion, seven hundred sixty million, three hundred fifty-seven thousand, five hundred five".