27380913809 has 2 divisors, whose sum is σ = 27380913810. Its totient is φ = 27380913808.

The previous prime is 27380913797. The next prime is 27380913829. The reversal of 27380913809 is 90831908372.

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., 21444673600 + 5936240209 = 146440^2 + 77047^2 .

It is a cyclic number.

It is not a de Polignac number, because 27380913809 - 2¹⁶ = 27380848273 is a prime.

It is not a weakly prime, because it can be changed into another prime (27380913829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13690456904 + 13690456905.

It is an arithmetic number, because the mean of its divisors is an integer number (13690456905).

Almost surely, 2^27380913809 is an apocalyptic number.

It is an amenable number.

27380913809 is a deficient number, since it is larger than the sum of its proper divisors (1).

27380913809 is an equidigital number, since it uses as much as digits as its factorization.

27380913809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 50.

The spelling of 27380913809 in words is "twenty-seven billion, three hundred eighty million, nine hundred thirteen thousand, eight hundred nine".