11665042641 has 24 divisors (see below), whose sum is σ = 20093823360. Its totient is φ = 6375923136.

The previous prime is 11665042639. The next prime is 11665042667. The reversal of 11665042641 is 14624056611.

11665042641 is a `hidden beast` number, since 1 + 1 + 6 + 6 + 5 + 0 + 4 + 2 + 641 = 666.

It is not a de Polignac number, because 11665042641 - 2¹ = 11665042639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11665042596 and 11665042605.

It is not an unprimeable number, because it can be changed into a prime (11665042841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4023756 + ... + 4026653.

It is an arithmetic number, because the mean of its divisors is an integer number (837242640).

Almost surely, 2^11665042641 is an apocalyptic number.

It is an amenable number.

11665042641 is a deficient number, since it is larger than the sum of its proper divisors (8428780719).

11665042641 is a wasteful number, since it uses less digits than its factorization.

11665042641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8050445 (or 8050442 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 11665042641 in words is "eleven billion, six hundred sixty-five million, forty-two thousand, six hundred forty-one".