27756532543 has 2 divisors, whose sum is σ = 27756532544. Its totient is φ = 27756532542.

The previous prime is 27756532513. The next prime is 27756532561. The reversal of 27756532543 is 34523565772.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27756532543 - 2²¹ = 27754435391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27756532513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13878266271 + 13878266272.

It is an arithmetic number, because the mean of its divisors is an integer number (13878266272).

Almost surely, 2^27756532543 is an apocalyptic number.

27756532543 is a deficient number, since it is larger than the sum of its proper divisors (1).

27756532543 is an equidigital number, since it uses as much as digits as its factorization.

27756532543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5292000, while the sum is 49.

The spelling of 27756532543 in words is "twenty-seven billion, seven hundred fifty-six million, five hundred thirty-two thousand, five hundred forty-three".