11243821856 has 24 divisors (see below), whose sum is σ = 22191502284. Its totient is φ = 5607884800.

The previous prime is 11243821819. The next prime is 11243821859. The reversal of 11243821856 is 65812834211.

It can be written as a sum of positive squares in 2 ways, for example, as 8338611856 + 2905210000 = 91316^2 + 53900^2 .

It is not an unprimeable number, because it can be changed into a prime (11243821859) 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, 425285 + ... + 450948.

Almost surely, 2^11243821856 is an apocalyptic number.

11243821856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11243821856 is a deficient number, since it is larger than the sum of its proper divisors (10947680428).

11243821856 is an equidigital number, since it uses as much as digits as its factorization.

11243821856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876644 (or 876636 counting only the distinct ones).

The product of its digits is 92160, while the sum is 41.

The spelling of 11243821856 in words is "eleven billion, two hundred forty-three million, eight hundred twenty-one thousand, eight hundred fifty-six".