11578170811 has 4 divisors (see below), whose sum is σ = 11951660224. Its totient is φ = 11204681400.

The previous prime is 11578170787. The next prime is 11578170833. The reversal of 11578170811 is 11807187511.

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

It is a cyclic number.

It is not a de Polignac number, because 11578170811 - 2¹⁵ = 11578138043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11578170871) 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, 186744660 + ... + 186744721.

It is an arithmetic number, because the mean of its divisors is an integer number (2987915056).

Almost surely, 2^11578170811 is an apocalyptic number.

11578170811 is a deficient number, since it is larger than the sum of its proper divisors (373489413).

11578170811 is an equidigital number, since it uses as much as digits as its factorization.

11578170811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373489412.

The product of its (nonzero) digits is 15680, while the sum is 40.

The spelling of 11578170811 in words is "eleven billion, five hundred seventy-eight million, one hundred seventy thousand, eight hundred eleven".