11728337447 has 4 divisors (see below), whose sum is σ = 11920605336. Its totient is φ = 11536069560.

The previous prime is 11728337443. The next prime is 11728337503. The reversal of 11728337447 is 74473382711.

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

It is a cyclic number.

It is not a de Polignac number, because 11728337447 - 2² = 11728337443 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11728337443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96133853 + ... + 96133974.

It is an arithmetic number, because the mean of its divisors is an integer number (2980151334).

Almost surely, 2^11728337447 is an apocalyptic number.

11728337447 is a deficient number, since it is larger than the sum of its proper divisors (192267889).

11728337447 is an equidigital number, since it uses as much as digits as its factorization.

11728337447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192267888.

The product of its digits is 790272, while the sum is 47.

The spelling of 11728337447 in words is "eleven billion, seven hundred twenty-eight million, three hundred thirty-seven thousand, four hundred forty-seven".