27750577457 has 2 divisors, whose sum is σ = 27750577458. Its totient is φ = 27750577456.

The previous prime is 27750577417. The next prime is 27750577499. The reversal of 27750577457 is 75477505772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27718587121 + 31990336 = 166489^2 + 5656^2 .

It is a cyclic number.

It is not a de Polignac number, because 27750577457 - 2²⁰ = 27749528881 is a prime.

It is not a weakly prime, because it can be changed into another prime (27750577417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13875288728 + 13875288729.

It is an arithmetic number, because the mean of its divisors is an integer number (13875288729).

Almost surely, 2^27750577457 is an apocalyptic number.

It is an amenable number.

27750577457 is a deficient number, since it is larger than the sum of its proper divisors (1).

27750577457 is an equidigital number, since it uses as much as digits as its factorization.

27750577457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16807000, while the sum is 56.

The spelling of 27750577457 in words is "twenty-seven billion, seven hundred fifty million, five hundred seventy-seven thousand, four hundred fifty-seven".