11814195817 has 4 divisors (see below), whose sum is σ = 11815669840. Its totient is φ = 11812721796.

The previous prime is 11814195787. The next prime is 11814195851. The reversal of 11814195817 is 71859141811.

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 11814195817 - 2⁷ = 11814195689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11814198817) 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, 724923 + ... + 741040.

It is an arithmetic number, because the mean of its divisors is an integer number (2953917460).

Almost surely, 2^11814195817 is an apocalyptic number.

It is an amenable number.

11814195817 is a deficient number, since it is larger than the sum of its proper divisors (1474023).

11814195817 is an equidigital number, since it uses as much as digits as its factorization.

11814195817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1474022.

The product of its digits is 80640, while the sum is 46.

The spelling of 11814195817 in words is "eleven billion, eight hundred fourteen million, one hundred ninety-five thousand, eight hundred seventeen".