27426446557 has 2 divisors, whose sum is σ = 27426446558. Its totient is φ = 27426446556.

The previous prime is 27426446527. The next prime is 27426446563. The reversal of 27426446557 is 75564462472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24525439236 + 2901007321 = 156606^2 + 53861^2 .

It is a cyclic number.

It is not a de Polignac number, because 27426446557 - 2⁷ = 27426446429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27426446527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13713223278 + 13713223279.

It is an arithmetic number, because the mean of its divisors is an integer number (13713223279).

Almost surely, 2^27426446557 is an apocalyptic number.

It is an amenable number.

27426446557 is a deficient number, since it is larger than the sum of its proper divisors (1).

27426446557 is an equidigital number, since it uses as much as digits as its factorization.

27426446557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11289600, while the sum is 52.

The spelling of 27426446557 in words is "twenty-seven billion, four hundred twenty-six million, four hundred forty-six thousand, five hundred fifty-seven".