11644044464 has 80 divisors (see below), whose sum is σ = 25961775840. Its totient is φ = 5011476480.

The previous prime is 11644044457. The next prime is 11644044479. The reversal of 11644044464 is 46444044611.

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, 370319 + ... + 400529.

It is an arithmetic number, because the mean of its divisors is an integer number (324522198).

Almost surely, 2^11644044464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11644044464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12980887920).

11644044464 is an abundant number, since it is smaller than the sum of its proper divisors (14317731376).

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

11644044464 is a wasteful number, since it uses less digits than its factorization.

11644044464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30358 (or 30352 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 38.

The spelling of 11644044464 in words is "eleven billion, six hundred forty-four million, forty-four thousand, four hundred sixty-four".