27681483793 has 2 divisors, whose sum is σ = 27681483794. Its totient is φ = 27681483792.

The previous prime is 27681483787. The next prime is 27681483811. The reversal of 27681483793 is 39738418672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26176974849 + 1504508944 = 161793^2 + 38788^2 .

It is a cyclic number.

It is not a de Polignac number, because 27681483793 - 2⁹ = 27681483281 is a prime.

It is not a weakly prime, because it can be changed into another prime (27681483703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13840741896 + 13840741897.

It is an arithmetic number, because the mean of its divisors is an integer number (13840741897).

Almost surely, 2^27681483793 is an apocalyptic number.

It is an amenable number.

27681483793 is a deficient number, since it is larger than the sum of its proper divisors (1).

27681483793 is an equidigital number, since it uses as much as digits as its factorization.

27681483793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12192768, while the sum is 58.

The spelling of 27681483793 in words is "twenty-seven billion, six hundred eighty-one million, four hundred eighty-three thousand, seven hundred ninety-three".