26646247249 has 2 divisors, whose sum is σ = 26646247250. Its totient is φ = 26646247248.

The previous prime is 26646247241. The next prime is 26646247279. The reversal of 26646247249 is 94274264662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25720140625 + 926106624 = 160375^2 + 30432^2 .

It is a cyclic number.

It is not a de Polignac number, because 26646247249 - 2³ = 26646247241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26646247196 and 26646247205.

It is not a weakly prime, because it can be changed into another prime (26646247241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13323123624 + 13323123625.

It is an arithmetic number, because the mean of its divisors is an integer number (13323123625).

Almost surely, 2^26646247249 is an apocalyptic number.

It is an amenable number.

26646247249 is a deficient number, since it is larger than the sum of its proper divisors (1).

26646247249 is an equidigital number, since it uses as much as digits as its factorization.

26646247249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6967296, while the sum is 52.

The spelling of 26646247249 in words is "twenty-six billion, six hundred forty-six million, two hundred forty-seven thousand, two hundred forty-nine".