27639236722393 has 2 divisors, whose sum is σ = 27639236722394. Its totient is φ = 27639236722392.

The previous prime is 27639236722303. The next prime is 27639236722441. The reversal of 27639236722393 is 39322763293672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26876012587264 + 763224135129 = 5184208^2 + 873627^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27639236722393 is a prime.

It is not a weakly prime, because it can be changed into another prime (27639236722303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13819618361196 + 13819618361197.

It is an arithmetic number, because the mean of its divisors is an integer number (13819618361197).

Almost surely, 2^{27639236722393} is an apocalyptic number.

It is an amenable number.

27639236722393 is a deficient number, since it is larger than the sum of its proper divisors (1).

27639236722393 is an equidigital number, since it uses as much as digits as its factorization.

27639236722393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 185177664, while the sum is 64.

The spelling of 27639236722393 in words is "twenty-seven trillion, six hundred thirty-nine billion, two hundred thirty-six million, seven hundred twenty-two thousand, three hundred ninety-three".