11565438403 has 2 divisors, whose sum is σ = 11565438404. Its totient is φ = 11565438402.

The previous prime is 11565438371. The next prime is 11565438433. The reversal of 11565438403 is 30483456511.

11565438403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11565438403 - 2⁵ = 11565438371 is a prime.

It is not a weakly prime, because it can be changed into another prime (11565438433) 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, 5782719201 + 5782719202.

It is an arithmetic number, because the mean of its divisors is an integer number (5782719202).

Almost surely, 2^11565438403 is an apocalyptic number.

11565438403 is a deficient number, since it is larger than the sum of its proper divisors (1).

11565438403 is an equidigital number, since it uses as much as digits as its factorization.

11565438403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 11565438403 in words is "eleven billion, five hundred sixty-five million, four hundred thirty-eight thousand, four hundred three".