27240075256397 has 2 divisors, whose sum is σ = 27240075256398. Its totient is φ = 27240075256396.

The previous prime is 27240075256367. The next prime is 27240075256417. The reversal of 27240075256397 is 79365257004272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20119001547241 + 7121073709156 = 4485421^2 + 2668534^2 .

It is a cyclic number.

It is not a de Polignac number, because 27240075256397 - 2¹² = 27240075252301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27240075256367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13620037628198 + 13620037628199.

It is an arithmetic number, because the mean of its divisors is an integer number (13620037628199).

Almost surely, 2^{27240075256397} is an apocalyptic number.

It is an amenable number.

27240075256397 is a deficient number, since it is larger than the sum of its proper divisors (1).

27240075256397 is an equidigital number, since it uses as much as digits as its factorization.

27240075256397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44452800, while the sum is 59.

The spelling of 27240075256397 in words is "twenty-seven trillion, two hundred forty billion, seventy-five million, two hundred fifty-six thousand, three hundred ninety-seven".