26320368409 has 2 divisors, whose sum is σ = 26320368410. Its totient is φ = 26320368408.

The previous prime is 26320368377. The next prime is 26320368449. The reversal of 26320368409 is 90486302362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21630173184 + 4690195225 = 147072^2 + 68485^2 .

It is a cyclic number.

It is not a de Polignac number, because 26320368409 - 2⁵ = 26320368377 is a prime.

It is not a weakly prime, because it can be changed into another prime (26320368449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13160184204 + 13160184205.

It is an arithmetic number, because the mean of its divisors is an integer number (13160184205).

Almost surely, 2^26320368409 is an apocalyptic number.

It is an amenable number.

26320368409 is a deficient number, since it is larger than the sum of its proper divisors (1).

26320368409 is an equidigital number, since it uses as much as digits as its factorization.

26320368409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 43.

The spelling of 26320368409 in words is "twenty-six billion, three hundred twenty million, three hundred sixty-eight thousand, four hundred nine".