11501605404901 has 2 divisors, whose sum is σ = 11501605404902. Its totient is φ = 11501605404900.

The previous prime is 11501605404769. The next prime is 11501605404907. The reversal of 11501605404901 is 10940450610511.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6114982176801 + 5386623228100 = 2472849^2 + 2320910^2 .

It is an emirp because it is prime and its reverse (10940450610511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11501605404901 - 2²⁹ = 11501068533989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11501605404907) 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, 5750802702450 + 5750802702451.

It is an arithmetic number, because the mean of its divisors is an integer number (5750802702451).

Almost surely, 2^{11501605404901} is an apocalyptic number.

It is an amenable number.

11501605404901 is a deficient number, since it is larger than the sum of its proper divisors (1).

11501605404901 is an equidigital number, since it uses as much as digits as its factorization.

11501605404901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 37.

The spelling of 11501605404901 in words is "eleven trillion, five hundred one billion, six hundred five million, four hundred four thousand, nine hundred one".