27775050509 has 2 divisors, whose sum is σ = 27775050510. Its totient is φ = 27775050508.

The previous prime is 27775050481. The next prime is 27775050557. The reversal of 27775050509 is 90505057772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26858293225 + 916757284 = 163885^2 + 30278^2 .

It is a cyclic number.

It is not a de Polignac number, because 27775050509 - 2¹² = 27775046413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27775050559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13887525254 + 13887525255.

It is an arithmetic number, because the mean of its divisors is an integer number (13887525255).

Almost surely, 2^27775050509 is an apocalyptic number.

It is an amenable number.

27775050509 is a deficient number, since it is larger than the sum of its proper divisors (1).

27775050509 is an equidigital number, since it uses as much as digits as its factorization.

27775050509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 771750, while the sum is 47.

The spelling of 27775050509 in words is "twenty-seven billion, seven hundred seventy-five million, fifty thousand, five hundred nine".