11691273834 has 24 divisors (see below), whose sum is σ = 26269283040. Its totient is φ = 3897091116.

The previous prime is 11691273833. The next prime is 11691273871. The reversal of 11691273834 is 43837219611.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 11691273834.

It is not an unprimeable number, because it can be changed into a prime (11691273833) 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 11 ways as a sum of consecutive naturals, for example, 12027574 + ... + 12028545.

It is an arithmetic number, because the mean of its divisors is an integer number (1094553460).

Almost surely, 2^11691273834 is an apocalyptic number.

11691273834 is an abundant number, since it is smaller than the sum of its proper divisors (14578009206).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11691273834 is an equidigital number, since it uses as much as digits as its factorization.

11691273834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24056136 (or 24056124 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The spelling of 11691273834 in words is "eleven billion, six hundred ninety-one million, two hundred seventy-three thousand, eight hundred thirty-four".