27249805481 has 2 divisors, whose sum is σ = 27249805482. Its totient is φ = 27249805480.

The previous prime is 27249805423. The next prime is 27249805589. The reversal of 27249805481 is 18450894272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27219720256 + 30085225 = 164984^2 + 5485^2 .

It is a cyclic number.

It is not a de Polignac number, because 27249805481 - 2³⁴ = 10069936297 is a prime.

It is a super-2 number, since 2×27249805481² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27249805181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13624902740 + 13624902741.

It is an arithmetic number, because the mean of its divisors is an integer number (13624902741).

Almost surely, 2^27249805481 is an apocalyptic number.

It is an amenable number.

27249805481 is a deficient number, since it is larger than the sum of its proper divisors (1).

27249805481 is an equidigital number, since it uses as much as digits as its factorization.

27249805481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1290240, while the sum is 50.

The spelling of 27249805481 in words is "twenty-seven billion, two hundred forty-nine million, eight hundred five thousand, four hundred eighty-one".