27735541613 has 4 divisors (see below), whose sum is σ = 29869044828. Its totient is φ = 25602038400.

The previous prime is 27735541573. The next prime is 27735541637. The reversal of 27735541613 is 31614553772.

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 2868459364 + 24867082249 = 53558^2 + 157693^2 .

It is a cyclic number.

It is not a de Polignac number, because 27735541613 - 2²⁰ = 27734493037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27735541313) 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, 1066751588 + ... + 1066751613.

It is an arithmetic number, because the mean of its divisors is an integer number (7467261207).

Almost surely, 2^27735541613 is an apocalyptic number.

It is an amenable number.

27735541613 is a deficient number, since it is larger than the sum of its proper divisors (2133503215).

27735541613 is a wasteful number, since it uses less digits than its factorization.

27735541613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2133503214.

The product of its digits is 529200, while the sum is 44.

The spelling of 27735541613 in words is "twenty-seven billion, seven hundred thirty-five million, five hundred forty-one thousand, six hundred thirteen".