11984643946 has 32 divisors (see below), whose sum is σ = 20702808000. Its totient is φ = 5146001280.

The previous prime is 11984643929. The next prime is 11984643947. The reversal of 11984643946 is 64934648911.

It is not an unprimeable number, because it can be changed into a prime (11984643947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104806 + ... + 186958.

It is an arithmetic number, because the mean of its divisors is an integer number (646962750).

Almost surely, 2^11984643946 is an apocalyptic number.

11984643946 is a deficient number, since it is larger than the sum of its proper divisors (8718164054).

11984643946 is a wasteful number, since it uses less digits than its factorization.

11984643946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82534.

The product of its digits is 4478976, while the sum is 55.

The spelling of 11984643946 in words is "eleven billion, nine hundred eighty-four million, six hundred forty-three thousand, nine hundred forty-six".