11451326266409 has 2 divisors, whose sum is σ = 11451326266410. Its totient is φ = 11451326266408.

The previous prime is 11451326266343. The next prime is 11451326266423. The reversal of 11451326266409 is 90466262315411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6200239440784 + 5251086825625 = 2490028^2 + 2291525^2 .

It is a cyclic number.

It is not a de Polignac number, because 11451326266409 - 2³² = 11447031299113 is a prime.

It is a super-2 number, since 2×11451326266409² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11451326266309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5725663133204 + 5725663133205.

It is an arithmetic number, because the mean of its divisors is an integer number (5725663133205).

Almost surely, 2^{11451326266409} is an apocalyptic number.

It is an amenable number.

11451326266409 is a deficient number, since it is larger than the sum of its proper divisors (1).

11451326266409 is an equidigital number, since it uses as much as digits as its factorization.

11451326266409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1866240, while the sum is 50.

The spelling of 11451326266409 in words is "eleven trillion, four hundred fifty-one billion, three hundred twenty-six million, two hundred sixty-six thousand, four hundred nine".