11447812447 has 4 divisors (see below), whose sum is σ = 11466367056. Its totient is φ = 11429257840.

The previous prime is 11447812429. The next prime is 11447812451. The reversal of 11447812447 is 74421874411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74421874411 = 29761 ⋅2500651.

It is a cyclic number.

It is not a de Polignac number, because 11447812447 - 2⁷ = 11447812319 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11447812487) 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 3 ways as a sum of consecutive naturals, for example, 9276379 + ... + 9277612.

It is an arithmetic number, because the mean of its divisors is an integer number (2866591764).

Almost surely, 2^11447812447 is an apocalyptic number.

11447812447 is a deficient number, since it is larger than the sum of its proper divisors (18554609).

11447812447 is an equidigital number, since it uses as much as digits as its factorization.

11447812447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18554608.

The product of its digits is 200704, while the sum is 43.

The spelling of 11447812447 in words is "eleven billion, four hundred forty-seven million, eight hundred twelve thousand, four hundred forty-seven".