27644053357 has 2 divisors, whose sum is σ = 27644053358. Its totient is φ = 27644053356.

The previous prime is 27644053331. The next prime is 27644053387. The reversal of 27644053357 is 75335044672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27587216836 + 56836521 = 166094^2 + 7539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27644053357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27644053387) 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 as a sum of consecutive naturals, namely, 13822026678 + 13822026679.

It is an arithmetic number, because the mean of its divisors is an integer number (13822026679).

Almost surely, 2^27644053357 is an apocalyptic number.

It is an amenable number.

27644053357 is a deficient number, since it is larger than the sum of its proper divisors (1).

27644053357 is an equidigital number, since it uses as much as digits as its factorization.

27644053357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2116800, while the sum is 46.

The spelling of 27644053357 in words is "twenty-seven billion, six hundred forty-four million, fifty-three thousand, three hundred fifty-seven".