11718275817 has 4 divisors (see below), whose sum is σ = 15624367760. Its totient is φ = 7812183876.

The previous prime is 11718275771. The next prime is 11718275827. The reversal of 11718275817 is 71857281711.

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 not a de Polignac number, because 11718275817 - 2⁷ = 11718275689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11718275827) 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, 1953045967 + ... + 1953045972.

It is an arithmetic number, because the mean of its divisors is an integer number (3906091940).

Almost surely, 2^11718275817 is an apocalyptic number.

It is an amenable number.

11718275817 is a deficient number, since it is larger than the sum of its proper divisors (3906091943).

11718275817 is an equidigital number, since it uses as much as digits as its factorization.

11718275817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3906091942.

The product of its digits is 219520, while the sum is 48.

The spelling of 11718275817 in words is "eleven billion, seven hundred eighteen million, two hundred seventy-five thousand, eight hundred seventeen".