27708513841 has 4 divisors (see below), whose sum is σ = 27962720500. Its totient is φ = 27454307184.

The previous prime is 27708513829. The next prime is 27708513857. The reversal of 27708513841 is 14831580772.

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 12352099600 + 15356414241 = 111140^2 + 123921^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27708513841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27708513791 and 27708513800.

It is not an unprimeable number, because it can be changed into a prime (27708511841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127103166 + ... + 127103383.

It is an arithmetic number, because the mean of its divisors is an integer number (6990680125).

Almost surely, 2^27708513841 is an apocalyptic number.

It is an amenable number.

27708513841 is a deficient number, since it is larger than the sum of its proper divisors (254206659).

27708513841 is a wasteful number, since it uses less digits than its factorization.

27708513841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254206658.

The product of its (nonzero) digits is 376320, while the sum is 46.

The spelling of 27708513841 in words is "twenty-seven billion, seven hundred eight million, five hundred thirteen thousand, eight hundred forty-one".