11691121419 has 48 divisors (see below), whose sum is σ = 18068469120. Its totient is φ = 7470392400.

The previous prime is 11691121417. The next prime is 11691121433. The reversal of 11691121419 is 91412119611.

11691121419 is a `hidden beast` number, since 116 + 9 + 1 + 121 + 419 = 666.

11691121419 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 11691121419 - 2¹ = 11691121417 is a prime.

It is a super-2 number, since 2×11691121419² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11691121417) 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 47 ways as a sum of consecutive naturals, for example, 2774224 + ... + 2778434.

It is an arithmetic number, because the mean of its divisors is an integer number (376426440).

Almost surely, 2^11691121419 is an apocalyptic number.

11691121419 is a deficient number, since it is larger than the sum of its proper divisors (6377347701).

11691121419 is a wasteful number, since it uses less digits than its factorization.

11691121419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4389 (or 4352 counting only the distinct ones).

The product of its digits is 3888, while the sum is 36.

The spelling of 11691121419 in words is "eleven billion, six hundred ninety-one million, one hundred twenty-one thousand, four hundred nineteen".