27804544693 has 2 divisors, whose sum is σ = 27804544694. Its totient is φ = 27804544692.

The previous prime is 27804544613. The next prime is 27804544699. The reversal of 27804544693 is 39644540872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23994939409 + 3809605284 = 154903^2 + 61722^2 .

It is a cyclic number.

It is not a de Polignac number, because 27804544693 - 2⁹ = 27804544181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27804544693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27804544699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13902272346 + 13902272347.

It is an arithmetic number, because the mean of its divisors is an integer number (13902272347).

Almost surely, 2^27804544693 is an apocalyptic number.

It is an amenable number.

27804544693 is a deficient number, since it is larger than the sum of its proper divisors (1).

27804544693 is an equidigital number, since it uses as much as digits as its factorization.

27804544693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5806080, while the sum is 52.

The spelling of 27804544693 in words is "twenty-seven billion, eight hundred four million, five hundred forty-four thousand, six hundred ninety-three".