11637729994643 has 4 divisors (see below), whose sum is σ = 11638167086280. Its totient is φ = 11637292903008.

The previous prime is 11637729994621. The next prime is 11637729994661. The reversal of 11637729994643 is 34649992773611.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11637729994643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11637729994343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218505878 + ... + 218559131.

It is an arithmetic number, because the mean of its divisors is an integer number (2909541771570).

Almost surely, 2^{11637729994643} is an apocalyptic number.

11637729994643 is a deficient number, since it is larger than the sum of its proper divisors (437091637).

11637729994643 is an equidigital number, since it uses as much as digits as its factorization.

11637729994643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437091636.

The product of its digits is 370355328, while the sum is 71.

The spelling of 11637729994643 in words is "eleven trillion, six hundred thirty-seven billion, seven hundred twenty-nine million, nine hundred ninety-four thousand, six hundred forty-three".