27664351427 has 2 divisors, whose sum is σ = 27664351428. Its totient is φ = 27664351426.

The previous prime is 27664351411. The next prime is 27664351457. The reversal of 27664351427 is 72415346672.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27664351427 - 2⁴ = 27664351411 is a prime.

It is not a weakly prime, because it can be changed into another prime (27664351457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13832175713 + 13832175714.

It is an arithmetic number, because the mean of its divisors is an integer number (13832175714).

Almost surely, 2^27664351427 is an apocalyptic number.

27664351427 is a deficient number, since it is larger than the sum of its proper divisors (1).

27664351427 is an equidigital number, since it uses as much as digits as its factorization.

27664351427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1693440, while the sum is 47.

The spelling of 27664351427 in words is "twenty-seven billion, six hundred sixty-four million, three hundred fifty-one thousand, four hundred twenty-seven".