11505389033813 has 4 divisors (see below), whose sum is σ = 11581583663328. Its totient is φ = 11429194404300.

The previous prime is 11505389033773. The next prime is 11505389033849. The reversal of 11505389033813 is 31833098350511.

11505389033813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11505389033813 - 2²⁴ = 11505372256597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11505389033863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38097314531 + ... + 38097314832.

It is an arithmetic number, because the mean of its divisors is an integer number (2895395915832).

Almost surely, 2^{11505389033813} is an apocalyptic number.

It is an amenable number.

11505389033813 is a deficient number, since it is larger than the sum of its proper divisors (76194629515).

11505389033813 is an equidigital number, since it uses as much as digits as its factorization.

11505389033813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76194629514.

The product of its (nonzero) digits is 1166400, while the sum is 50.

The spelling of 11505389033813 in words is "eleven trillion, five hundred five billion, three hundred eighty-nine million, thirty-three thousand, eight hundred thirteen".