11215411718 has 32 divisors (see below), whose sum is σ = 19559232000. Its totient is φ = 4724051904.

The previous prime is 11215411709. The next prime is 11215411729. The reversal of 11215411718 is 81711451211.

11215411718 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 181133 + ... + 235031.

It is an arithmetic number, because the mean of its divisors is an integer number (611226000).

Almost surely, 2^11215411718 is an apocalyptic number.

11215411718 is a deficient number, since it is larger than the sum of its proper divisors (8343820282).

11215411718 is a wasteful number, since it uses less digits than its factorization.

11215411718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54164.

The product of its digits is 2240, while the sum is 32.

Adding to 11215411718 its reverse (81711451211), we get a palindrome (92926862929).

The spelling of 11215411718 in words is "eleven billion, two hundred fifteen million, four hundred eleven thousand, seven hundred eighteen".