27240774521 has 2 divisors, whose sum is σ = 27240774522. Its totient is φ = 27240774520.

The previous prime is 27240774511. The next prime is 27240774529. The reversal of 27240774521 is 12547704272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22722246121 + 4518528400 = 150739^2 + 67220^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27240774521 is a prime.

It is not a weakly prime, because it can be changed into another prime (27240774529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13620387260 + 13620387261.

It is an arithmetic number, because the mean of its divisors is an integer number (13620387261).

Almost surely, 2^27240774521 is an apocalyptic number.

It is an amenable number.

27240774521 is a deficient number, since it is larger than the sum of its proper divisors (1).

27240774521 is an equidigital number, since it uses as much as digits as its factorization.

27240774521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 219520, while the sum is 41.

The spelling of 27240774521 in words is "twenty-seven billion, two hundred forty million, seven hundred seventy-four thousand, five hundred twenty-one".