11478718865 has 12 divisors (see below), whose sum is σ = 14148541596. Its totient is φ = 8933652288.

The previous prime is 11478718837. The next prime is 11478718891. The reversal of 11478718865 is 56881787411.

11478718865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 585204481 + 10893514384 = 24191^2 + 104372^2 .

It is not a de Polignac number, because 11478718865 - 2¹⁸ = 11478456721 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11478718865.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1453307 + ... + 1461183.

It is an arithmetic number, because the mean of its divisors is an integer number (1179045133).

Almost surely, 2^11478718865 is an apocalyptic number.

It is an amenable number.

11478718865 is a deficient number, since it is larger than the sum of its proper divisors (2669822731).

11478718865 is an frugal number, since it uses more digits than its factorization.

11478718865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15796 (or 7919 counting only the distinct ones).

The product of its digits is 3010560, while the sum is 56.

The spelling of 11478718865 in words is "eleven billion, four hundred seventy-eight million, seven hundred eighteen thousand, eight hundred sixty-five".