11665391743 has 4 divisors (see below), whose sum is σ = 11885493528. Its totient is φ = 11445289960.

The previous prime is 11665391737. The next prime is 11665391797. The reversal of 11665391743 is 34719356611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34719356611 = 42131 ⋅824081.

It is a cyclic number.

It is not a de Polignac number, because 11665391743 - 2²⁹ = 11128520831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11665391693 and 11665391702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11665391443) 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, 110050813 + ... + 110050918.

It is an arithmetic number, because the mean of its divisors is an integer number (2971373382).

Almost surely, 2^11665391743 is an apocalyptic number.

11665391743 is a deficient number, since it is larger than the sum of its proper divisors (220101785).

11665391743 is an equidigital number, since it uses as much as digits as its factorization.

11665391743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220101784.

The product of its digits is 408240, while the sum is 46.

The spelling of 11665391743 in words is "eleven billion, six hundred sixty-five million, three hundred ninety-one thousand, seven hundred forty-three".