11261219856 has 20 divisors (see below), whose sum is σ = 29091484752. Its totient is φ = 3753739936.

The previous prime is 11261219843. The next prime is 11261219863. The reversal of 11261219856 is 65891216211.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117304326 + ... + 117304421.

Almost surely, 2^11261219856 is an apocalyptic number.

11261219856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11261219856 is an abundant number, since it is smaller than the sum of its proper divisors (17830264896).

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

11261219856 is a wasteful number, since it uses less digits than its factorization.

11261219856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234608758 (or 234608752 counting only the distinct ones).

The product of its digits is 51840, while the sum is 42.

The spelling of 11261219856 in words is "eleven billion, two hundred sixty-one million, two hundred nineteen thousand, eight hundred fifty-six".