27976209257 has 2 divisors, whose sum is σ = 27976209258. Its totient is φ = 27976209256.

The previous prime is 27976209227. The next prime is 27976209263. The reversal of 27976209257 is 75290267972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22480804096 + 5495405161 = 149936^2 + 74131^2 .

It is a cyclic number.

It is not a de Polignac number, because 27976209257 - 2¹⁰ = 27976208233 is a prime.

It is not a weakly prime, because it can be changed into another prime (27976209227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13988104628 + 13988104629.

It is an arithmetic number, because the mean of its divisors is an integer number (13988104629).

Almost surely, 2^27976209257 is an apocalyptic number.

It is an amenable number.

27976209257 is a deficient number, since it is larger than the sum of its proper divisors (1).

27976209257 is an equidigital number, since it uses as much as digits as its factorization.

27976209257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6667920, while the sum is 56.

The spelling of 27976209257 in words is "twenty-seven billion, nine hundred seventy-six million, two hundred nine thousand, two hundred fifty-seven".