11665541123125 has 20 divisors (see below), whose sum is σ = 14578565990560. Its totient is φ = 9331596918000.

The previous prime is 11665541123111. The next prime is 11665541123143. The reversal of 11665541123125 is 52132114556611.

It is a de Polignac number, because none of the positive numbers 2^k-11665541123125 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6194014 + ... + 7854736.

It is an arithmetic number, because the mean of its divisors is an integer number (728928299528).

Almost surely, 2^{11665541123125} is an apocalyptic number.

It is an amenable number.

11665541123125 is a deficient number, since it is larger than the sum of its proper divisors (2913024867435).

11665541123125 is an equidigital number, since it uses as much as digits as its factorization.

11665541123125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671982 (or 1671967 counting only the distinct ones).

The product of its digits is 216000, while the sum is 43.

Adding to 11665541123125 its reverse (52132114556611), we get a palindrome (63797655679736).

The spelling of 11665541123125 in words is "eleven trillion, six hundred sixty-five billion, five hundred forty-one million, one hundred twenty-three thousand, one hundred twenty-five".