26444739323309 has 2 divisors, whose sum is σ = 26444739323310. Its totient is φ = 26444739323308.

The previous prime is 26444739323263. The next prime is 26444739323333. The reversal of 26444739323309 is 90332393744462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26176832668900 + 267906654409 = 5116330^2 + 517597^2 .

It is a cyclic number.

It is not a de Polignac number, because 26444739323309 - 2¹² = 26444739319213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26444739323369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13222369661654 + 13222369661655.

It is an arithmetic number, because the mean of its divisors is an integer number (13222369661655).

Almost surely, 2^{26444739323309} is an apocalyptic number.

It is an amenable number.

26444739323309 is a deficient number, since it is larger than the sum of its proper divisors (1).

26444739323309 is an equidigital number, since it uses as much as digits as its factorization.

26444739323309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70543872, while the sum is 59.

The spelling of 26444739323309 in words is "twenty-six trillion, four hundred forty-four billion, seven hundred thirty-nine million, three hundred twenty-three thousand, three hundred nine".