26909449649 has 2 divisors, whose sum is σ = 26909449650. Its totient is φ = 26909449648.

The previous prime is 26909449631. The next prime is 26909449667. The reversal of 26909449649 is 94694490962.

It is a balanced prime because it is at equal distance from previous prime (26909449631) and next prime (26909449667).

It can be written as a sum of positive squares in only one way, i.e., 14891809024 + 12017640625 = 122032^2 + 109625^2 .

It is a cyclic number.

It is not a de Polignac number, because 26909449649 - 2⁸ = 26909449393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26909449591 and 26909449600.

It is not a weakly prime, because it can be changed into another prime (26909449669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13454724824 + 13454724825.

It is an arithmetic number, because the mean of its divisors is an integer number (13454724825).

Almost surely, 2^26909449649 is an apocalyptic number.

It is an amenable number.

26909449649 is a deficient number, since it is larger than the sum of its proper divisors (1).

26909449649 is an equidigital number, since it uses as much as digits as its factorization.

26909449649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30233088, while the sum is 62.

The spelling of 26909449649 in words is "twenty-six billion, nine hundred nine million, four hundred forty-nine thousand, six hundred forty-nine".