27256423549 has 2 divisors, whose sum is σ = 27256423550. Its totient is φ = 27256423548.

The previous prime is 27256423511. The next prime is 27256423567. The reversal of 27256423549 is 94532465272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15436820025 + 11819603524 = 124245^2 + 108718^2 .

It is a cyclic number.

It is not a de Polignac number, because 27256423549 - 2⁷ = 27256423421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27256483549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13628211774 + 13628211775.

It is an arithmetic number, because the mean of its divisors is an integer number (13628211775).

Almost surely, 2^27256423549 is an apocalyptic number.

It is an amenable number.

27256423549 is a deficient number, since it is larger than the sum of its proper divisors (1).

27256423549 is an equidigital number, since it uses as much as digits as its factorization.

27256423549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3628800, while the sum is 49.

The spelling of 27256423549 in words is "twenty-seven billion, two hundred fifty-six million, four hundred twenty-three thousand, five hundred forty-nine".