264444242444549 has 2 divisors, whose sum is σ = 264444242444550. Its totient is φ = 264444242444548.

The previous prime is 264444242444531. The next prime is 264444242444639. The reversal of 264444242444549 is 945444242444462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155844813023524 + 108599429421025 = 12483782^2 + 10421105^2 .

It is a cyclic number.

It is not a de Polignac number, because 264444242444549 - 2⁸ = 264444242444293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 264444242444491 and 264444242444500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264444242444509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132222121222274 + 132222121222275.

It is an arithmetic number, because the mean of its divisors is an integer number (132222121222275).

Almost surely, 2^{264444242444549} is an apocalyptic number.

It is an amenable number.

264444242444549 is a deficient number, since it is larger than the sum of its proper divisors (1).

264444242444549 is an equidigital number, since it uses as much as digits as its factorization.

264444242444549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 566231040, while the sum is 62.

The spelling of 264444242444549 in words is "two hundred sixty-four trillion, four hundred forty-four billion, two hundred forty-two million, four hundred forty-four thousand, five hundred forty-nine".