11640664056 has 64 divisors (see below), whose sum is σ = 33308064000. Its totient is φ = 3321001728.

The previous prime is 11640664043. The next prime is 11640664093. The reversal of 11640664056 is 65046604611.

It is a happy number.

It is a super-3 number, since 3×11640664056³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64020 + ... + 165468.

It is an arithmetic number, because the mean of its divisors is an integer number (520438500).

Almost surely, 2^11640664056 is an apocalyptic number.

It is an amenable number.

11640664056 is an abundant number, since it is smaller than the sum of its proper divisors (21667399944).

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

11640664056 is a wasteful number, since it uses less digits than its factorization.

11640664056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102148 (or 102144 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 11640664056 in words is "eleven billion, six hundred forty million, six hundred sixty-four thousand, fifty-six".