27475745705 has 4 divisors (see below), whose sum is σ = 32970894852. Its totient is φ = 21980596560.

The previous prime is 27475745683. The next prime is 27475745707. The reversal of 27475745705 is 50754757472.

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 19352148544 + 8123597161 = 139112^2 + 90131^2 .

It is not a de Polignac number, because 27475745705 - 2¹⁸ = 27475483561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27475745707) 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, 2747574566 + ... + 2747574575.

It is an arithmetic number, because the mean of its divisors is an integer number (8242723713).

Almost surely, 2^27475745705 is an apocalyptic number.

It is an amenable number.

27475745705 is a deficient number, since it is larger than the sum of its proper divisors (5495149147).

27475745705 is an equidigital number, since it uses as much as digits as its factorization.

27475745705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5495149146.

The product of its (nonzero) digits is 9604000, while the sum is 53.

The spelling of 27475745705 in words is "twenty-seven billion, four hundred seventy-five million, seven hundred forty-five thousand, seven hundred five".