27866611313 has 4 divisors (see below), whose sum is σ = 28053635700. Its totient is φ = 27679586928.

The previous prime is 27866611303. The next prime is 27866611321. The reversal of 27866611313 is 31311666872.

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 1490577664 + 26376033649 = 38608^2 + 162407^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27866611313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27866611303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93511970 + ... + 93512267.

It is an arithmetic number, because the mean of its divisors is an integer number (7013408925).

Almost surely, 2^27866611313 is an apocalyptic number.

It is an amenable number.

27866611313 is a deficient number, since it is larger than the sum of its proper divisors (187024387).

27866611313 is a wasteful number, since it uses less digits than its factorization.

27866611313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187024386.

The product of its digits is 217728, while the sum is 44.

The spelling of 27866611313 in words is "twenty-seven billion, eight hundred sixty-six million, six hundred eleven thousand, three hundred thirteen".