27458644481 has 2 divisors, whose sum is σ = 27458644482. Its totient is φ = 27458644480.

The previous prime is 27458644459. The next prime is 27458644589. The reversal of 27458644481 is 18444685472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27096122881 + 362521600 = 164609^2 + 19040^2 .

It is a cyclic number.

It is not a de Polignac number, because 27458644481 - 2³⁰ = 26384902657 is a prime.

It is a super-2 number, since 2×27458644481² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27458649481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13729322240 + 13729322241.

It is an arithmetic number, because the mean of its divisors is an integer number (13729322241).

Almost surely, 2^27458644481 is an apocalyptic number.

It is an amenable number.

27458644481 is a deficient number, since it is larger than the sum of its proper divisors (1).

27458644481 is an equidigital number, since it uses as much as digits as its factorization.

27458644481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6881280, while the sum is 53.

The spelling of 27458644481 in words is "twenty-seven billion, four hundred fifty-eight million, six hundred forty-four thousand, four hundred eighty-one".