26655231649 has 2 divisors, whose sum is σ = 26655231650. Its totient is φ = 26655231648.

The previous prime is 26655231623. The next prime is 26655231697. The reversal of 26655231649 is 94613255662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16176024225 + 10479207424 = 127185^2 + 102368^2 .

It is a cyclic number.

It is not a de Polignac number, because 26655231649 - 2⁷ = 26655231521 is a prime.

It is not a weakly prime, because it can be changed into another prime (26655231619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13327615824 + 13327615825.

It is an arithmetic number, because the mean of its divisors is an integer number (13327615825).

Almost surely, 2^26655231649 is an apocalyptic number.

It is an amenable number.

26655231649 is a deficient number, since it is larger than the sum of its proper divisors (1).

26655231649 is an equidigital number, since it uses as much as digits as its factorization.

26655231649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2332800, while the sum is 49.

The spelling of 26655231649 in words is "twenty-six billion, six hundred fifty-five million, two hundred thirty-one thousand, six hundred forty-nine".