26311123649 has 2 divisors, whose sum is σ = 26311123650. Its totient is φ = 26311123648.

The previous prime is 26311123621. The next prime is 26311123777. The reversal of 26311123649 is 94632111362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18880683649 + 7430440000 = 137407^2 + 86200^2 .

It is a cyclic number.

It is not a de Polignac number, because 26311123649 - 2³² = 22016156353 is a prime.

It is not a weakly prime, because it can be changed into another prime (26311123049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13155561824 + 13155561825.

It is an arithmetic number, because the mean of its divisors is an integer number (13155561825).

Almost surely, 2^26311123649 is an apocalyptic number.

It is an amenable number.

26311123649 is a deficient number, since it is larger than the sum of its proper divisors (1).

26311123649 is an equidigital number, since it uses as much as digits as its factorization.

26311123649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 38.

The spelling of 26311123649 in words is "twenty-six billion, three hundred eleven million, one hundred twenty-three thousand, six hundred forty-nine".