11643205653 has 16 divisors (see below), whose sum is σ = 17266996800. Its totient is φ = 7754125680.

The previous prime is 11643205631. The next prime is 11643205657. The reversal of 11643205653 is 35650234611.

11643205653 is a `hidden beast` number, since 1 + 1 + 64 + 32 + 0 + 565 + 3 = 666.

It is not a de Polignac number, because 11643205653 - 2⁸ = 11643205397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11643205657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195838 + ... + 248271.

It is an arithmetic number, because the mean of its divisors is an integer number (1079187300).

Almost surely, 2^11643205653 is an apocalyptic number.

It is an amenable number.

11643205653 is a deficient number, since it is larger than the sum of its proper divisors (5623791147).

11643205653 is an equidigital number, since it uses as much as digits as its factorization.

11643205653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445089 (or 445083 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The spelling of 11643205653 in words is "eleven billion, six hundred forty-three million, two hundred five thousand, six hundred fifty-three".