27781144930547 has 2 divisors, whose sum is σ = 27781144930548. Its totient is φ = 27781144930546.

The previous prime is 27781144930543. The next prime is 27781144930571. The reversal of 27781144930547 is 74503944118772.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27781144930547 - 2² = 27781144930543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27781144930547.

It is not a weakly prime, because it can be changed into another prime (27781144930543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13890572465273 + 13890572465274.

It is an arithmetic number, because the mean of its divisors is an integer number (13890572465274).

Almost surely, 2^{27781144930547} is an apocalyptic number.

27781144930547 is a deficient number, since it is larger than the sum of its proper divisors (1).

27781144930547 is an equidigital number, since it uses as much as digits as its factorization.

27781144930547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47416320, while the sum is 62.

The spelling of 27781144930547 in words is "twenty-seven trillion, seven hundred eighty-one billion, one hundred forty-four million, nine hundred thirty thousand, five hundred forty-seven".