27735751513 has 4 divisors (see below), whose sum is σ = 27736115620. Its totient is φ = 27735387408.

The previous prime is 27735751471. The next prime is 27735751529. The reversal of 27735751513 is 31515753772.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 9706781529 + 18028969984 = 98523^2 + 134272^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27735751513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27735751573) 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, 19278 + ... + 236311.

It is an arithmetic number, because the mean of its divisors is an integer number (6934028905).

Almost surely, 2^27735751513 is an apocalyptic number.

It is an amenable number.

27735751513 is a deficient number, since it is larger than the sum of its proper divisors (364107).

27735751513 is a wasteful number, since it uses less digits than its factorization.

27735751513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364106.

The product of its digits is 771750, while the sum is 46.

The spelling of 27735751513 in words is "twenty-seven billion, seven hundred thirty-five million, seven hundred fifty-one thousand, five hundred thirteen".