11509844664 has 32 divisors (see below), whose sum is σ = 29386840320. Its totient is φ = 3754984416.

The previous prime is 11509844663. The next prime is 11509844669. The reversal of 11509844664 is 46644890511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11509844663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5100754 + ... + 5103009.

It is an arithmetic number, because the mean of its divisors is an integer number (918338760).

Almost surely, 2^11509844664 is an apocalyptic number.

It is an amenable number.

11509844664 is an abundant number, since it is smaller than the sum of its proper divisors (17876995656).

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

11509844664 is a wasteful number, since it uses less digits than its factorization.

11509844664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10203819 (or 10203815 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 11509844664 in words is "eleven billion, five hundred nine million, eight hundred forty-four thousand, six hundred sixty-four".