11665465223391 has 128 divisors (see below), whose sum is σ = 20153003212800. Its totient is φ = 6531122016000.

The previous prime is 11665465223387. The next prime is 11665465223437. The reversal of 11665465223391 is 19332256456611.

11665465223391 is a `hidden beast` number, since 1 + 1 + 6 + 6 + 546 + 5 + 2 + 2 + 3 + 3 + 91 = 666.

It is not a de Polignac number, because 11665465223391 - 2² = 11665465223387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11665465225391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5418236371 + ... + 5418238523.

It is an arithmetic number, because the mean of its divisors is an integer number (157445337600).

Almost surely, 2^{11665465223391} is an apocalyptic number.

11665465223391 is a deficient number, since it is larger than the sum of its proper divisors (8487537989409).

11665465223391 is a wasteful number, since it uses less digits than its factorization.

11665465223391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3626 (or 3620 counting only the distinct ones).

The product of its digits is 6998400, while the sum is 54.

The spelling of 11665465223391 in words is "eleven trillion, six hundred sixty-five billion, four hundred sixty-five million, two hundred twenty-three thousand, three hundred ninety-one".