11509482391171 has 4 divisors (see below), whose sum is σ = 12009894669072. Its totient is φ = 11009070113272.

The previous prime is 11509482391111. The next prime is 11509482391189. The reversal of 11509482391171 is 17119328490511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11509482391171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11509482391111) 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, 250206138916 + ... + 250206138961.

It is an arithmetic number, because the mean of its divisors is an integer number (3002473667268).

Almost surely, 2^{11509482391171} is an apocalyptic number.

11509482391171 is a deficient number, since it is larger than the sum of its proper divisors (500412277901).

11509482391171 is an equidigital number, since it uses as much as digits as its factorization.

11509482391171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500412277900.

The product of its (nonzero) digits is 544320, while the sum is 52.

The spelling of 11509482391171 in words is "eleven trillion, five hundred nine billion, four hundred eighty-two million, three hundred ninety-one thousand, one hundred seventy-one".