11814785919 has 24 divisors (see below), whose sum is σ = 18692771760. Its totient is φ = 7157568768.

The previous prime is 11814785911. The next prime is 11814785923. The reversal of 11814785919 is 91958741811.

11814785919 is a `hidden beast` number, since 1 + 1 + 8 + 1 + 47 + 8 + 591 + 9 = 666.

It is not a de Polignac number, because 11814785919 - 2³ = 11814785911 is a prime.

It is a super-2 number, since 2×11814785919² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11814785911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1326957 + ... + 1335830.

It is an arithmetic number, because the mean of its divisors is an integer number (778865490).

Almost surely, 2^11814785919 is an apocalyptic number.

11814785919 is a deficient number, since it is larger than the sum of its proper divisors (6877985841).

11814785919 is a wasteful number, since it uses less digits than its factorization.

11814785919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2662839 (or 2662836 counting only the distinct ones).

The product of its digits is 725760, while the sum is 54.

The spelling of 11814785919 in words is "eleven billion, eight hundred fourteen million, seven hundred eighty-five thousand, nine hundred nineteen".