11905109056 has 56 divisors (see below), whose sum is σ = 24610446080. Its totient is φ = 5707584000.

The previous prime is 11905109039. The next prime is 11905109093. The reversal of 11905109056 is 65090150911.

It is a super-2 number, since 2×11905109056² (a number of 21 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 188731 + ... + 243781.

Almost surely, 2^11905109056 is an apocalyptic number.

11905109056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11905109056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12305223040).

11905109056 is an abundant number, since it is smaller than the sum of its proper divisors (12705337024).

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

11905109056 is a wasteful number, since it uses less digits than its factorization.

11905109056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55203 (or 55193 counting only the distinct ones).

The product of its (nonzero) digits is 12150, while the sum is 37.

Adding to 11905109056 its reverse (65090150911), we get a palindrome (76995259967).

The spelling of 11905109056 in words is "eleven billion, nine hundred five million, one hundred nine thousand, fifty-six".