11691819471 has 16 divisors (see below), whose sum is σ = 16277529600. Its totient is φ = 7450771680.

The previous prime is 11691819443. The next prime is 11691819493. The reversal of 11691819471 is 17491819611.

11691819471 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11691819471 - 2⁵ = 11691819439 is a prime.

It is a super-3 number, since 3×11691819471³ (a number of 31 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11691819471.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11691819421) by changing a digit.

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, 52186 + ... + 161576.

It is an arithmetic number, because the mean of its divisors is an integer number (1017345600).

Almost surely, 2^11691819471 is an apocalyptic number.

11691819471 is a deficient number, since it is larger than the sum of its proper divisors (4585710129).

11691819471 is a wasteful number, since it uses less digits than its factorization.

11691819471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110966.

The product of its digits is 108864, while the sum is 48.

The spelling of 11691819471 in words is "eleven billion, six hundred ninety-one million, eight hundred nineteen thousand, four hundred seventy-one".