11643013665 has 48 divisors (see below), whose sum is σ = 21167797248. Its totient is φ = 5913191808.

The previous prime is 11643013633. The next prime is 11643013691. The reversal of 11643013665 is 56631034611.

11643013665 is a `hidden beast` number, since 1 + 1 + 643 + 0 + 1 + 3 + 6 + 6 + 5 = 666.

11643013665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11643013665 - 2⁵ = 11643013633 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3864 + ... + 152646.

It is an arithmetic number, because the mean of its divisors is an integer number (440995776).

Almost surely, 2^11643013665 is an apocalyptic number.

11643013665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11643013665 is a deficient number, since it is larger than the sum of its proper divisors (9524783583).

11643013665 is a wasteful number, since it uses less digits than its factorization.

11643013665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148878 (or 148875 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The spelling of 11643013665 in words is "eleven billion, six hundred forty-three million, thirteen thousand, six hundred sixty-five".