11643204705 has 32 divisors (see below), whose sum is σ = 20397754368. Its totient is φ = 5624337600.

The previous prime is 11643204611. The next prime is 11643204707. The reversal of 11643204705 is 50740234611.

It is not a de Polignac number, because 11643204705 - 2⁸ = 11643204449 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11643204707) 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 31 ways as a sum of consecutive naturals, for example, 85479 + ... + 174908.

It is an arithmetic number, because the mean of its divisors is an integer number (637429824).

Almost surely, 2^11643204705 is an apocalyptic number.

11643204705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11643204705 is a deficient number, since it is larger than the sum of its proper divisors (8754549663).

11643204705 is a wasteful number, since it uses less digits than its factorization.

11643204705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260677.

The product of its (nonzero) digits is 20160, while the sum is 33.

The spelling of 11643204705 in words is "eleven billion, six hundred forty-three million, two hundred four thousand, seven hundred five".