26256225649 has 2 divisors, whose sum is σ = 26256225650. Its totient is φ = 26256225648.

The previous prime is 26256225643. The next prime is 26256225691. The reversal of 26256225649 is 94652265262.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19428178225 + 6828047424 = 139385^2 + 82632^2 .

It is a cyclic number.

It is not a de Polignac number, because 26256225649 - 2³ = 26256225641 is a prime.

It is not a weakly prime, because it can be changed into another prime (26256225641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13128112824 + 13128112825.

It is an arithmetic number, because the mean of its divisors is an integer number (13128112825).

Almost surely, 2^26256225649 is an apocalyptic number.

It is an amenable number.

26256225649 is a deficient number, since it is larger than the sum of its proper divisors (1).

26256225649 is an equidigital number, since it uses as much as digits as its factorization.

26256225649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3110400, while the sum is 49.

The spelling of 26256225649 in words is "twenty-six billion, two hundred fifty-six million, two hundred twenty-five thousand, six hundred forty-nine".