11643143446 has 16 divisors (see below), whose sum is σ = 19209878928. Its totient is φ = 5292336720.

The previous prime is 11643143443. The next prime is 11643143453. The reversal of 11643143446 is 64434134611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11643143441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2184255 + ... + 2189578.

It is an arithmetic number, because the mean of its divisors is an integer number (1200617433).

Almost surely, 2^11643143446 is an apocalyptic number.

11643143446 is a deficient number, since it is larger than the sum of its proper divisors (7566735482).

11643143446 is an equidigital number, since it uses as much as digits as its factorization.

11643143446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4373868 (or 4373846 counting only the distinct ones).

The product of its digits is 82944, while the sum is 37.

The spelling of 11643143446 in words is "eleven billion, six hundred forty-three million, one hundred forty-three thousand, four hundred forty-six".