11421805056 has 40 divisors (see below), whose sum is σ = 30428406624. Its totient is φ = 3807267840.

The previous prime is 11421805049. The next prime is 11421805081. The reversal of 11421805056 is 65050812411.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3716500 + ... + 3719571.

Almost surely, 2^11421805056 is an apocalyptic number.

11421805056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11421805056 is an abundant number, since it is smaller than the sum of its proper divisors (19006601568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11421805056 is an frugal number, since it uses more digits than its factorization.

11421805056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7436092 (or 7436076 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 33.

The spelling of 11421805056 in words is "eleven billion, four hundred twenty-one million, eight hundred five thousand, fifty-six".