11217938564 has 12 divisors (see below), whose sum is σ = 22435877184. Its totient is φ = 4807687944.

The previous prime is 11217938551. The next prime is 11217938569. The reversal of 11217938564 is 46583971211.

11217938564 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (11217938569) 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, 200320304 + ... + 200320359.

It is an arithmetic number, because the mean of its divisors is an integer number (1869656432).

Almost surely, 2^11217938564 is an apocalyptic number.

11217938564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

11217938564 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

11217938564 is a wasteful number, since it uses less digits than its factorization.

11217938564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400640674 (or 400640672 counting only the distinct ones).

The product of its digits is 362880, while the sum is 47.

The spelling of 11217938564 in words is "eleven billion, two hundred seventeen million, nine hundred thirty-eight thousand, five hundred sixty-four".