11691313447 has 4 divisors (see below), whose sum is σ = 12754160136. Its totient is φ = 10628466760.

The previous prime is 11691313429. The next prime is 11691313451. The reversal of 11691313447 is 74431319611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11691313447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11691313427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531423328 + ... + 531423349.

It is an arithmetic number, because the mean of its divisors is an integer number (3188540034).

Almost surely, 2^11691313447 is an apocalyptic number.

11691313447 is a deficient number, since it is larger than the sum of its proper divisors (1062846689).

11691313447 is a wasteful number, since it uses less digits than its factorization.

11691313447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062846688.

The product of its digits is 54432, while the sum is 40.

The spelling of 11691313447 in words is "eleven billion, six hundred ninety-one million, three hundred thirteen thousand, four hundred forty-seven".