27771623093 has 2 divisors, whose sum is σ = 27771623094. Its totient is φ = 27771623092.

The previous prime is 27771623081. The next prime is 27771623149. The reversal of 27771623093 is 39032617772.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21426226129 + 6345396964 = 146377^2 + 79658^2 .

It is a cyclic number.

It is not a de Polignac number, because 27771623093 - 2¹⁰ = 27771622069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27771623003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13885811546 + 13885811547.

It is an arithmetic number, because the mean of its divisors is an integer number (13885811547).

Almost surely, 2^27771623093 is an apocalyptic number.

It is an amenable number.

27771623093 is a deficient number, since it is larger than the sum of its proper divisors (1).

27771623093 is an equidigital number, since it uses as much as digits as its factorization.

27771623093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 666792, while the sum is 47.

The spelling of 27771623093 in words is "twenty-seven billion, seven hundred seventy-one million, six hundred twenty-three thousand, ninety-three".