11315885817 has 4 divisors (see below), whose sum is σ = 15087847760. Its totient is φ = 7543923876.

The previous prime is 11315885813. The next prime is 11315885827. The reversal of 11315885817 is 71858851311.

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 11315885817 - 2² = 11315885813 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11315885813) 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, 1885980967 + ... + 1885980972.

It is an arithmetic number, because the mean of its divisors is an integer number (3771961940).

Almost surely, 2^11315885817 is an apocalyptic number.

It is an amenable number.

11315885817 is a deficient number, since it is larger than the sum of its proper divisors (3771961943).

11315885817 is an equidigital number, since it uses as much as digits as its factorization.

11315885817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3771961942.

The product of its digits is 268800, while the sum is 48.

The spelling of 11315885817 in words is "eleven billion, three hundred fifteen million, eight hundred eighty-five thousand, eight hundred seventeen".