11643399424 has 90 divisors (see below), whose sum is σ = 24602784850. Its totient is φ = 5499491328.

The previous prime is 11643399403. The next prime is 11643399487. The reversal of 11643399424 is 42499334611.

It can be written as a sum of positive squares in only one way, i.e., 10809345024 + 834054400 = 103968^2 + 28880^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 33362002 + ... + 33362350.

Almost surely, 2^11643399424 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 11643399424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12301392425).

11643399424 is an abundant number, since it is smaller than the sum of its proper divisors (12959385426).

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

11643399424 is an frugal number, since it uses more digits than its factorization.

11643399424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441 (or 370 counting only the distinct ones).

The product of its digits is 559872, while the sum is 46.

The spelling of 11643399424 in words is "eleven billion, six hundred forty-three million, three hundred ninety-nine thousand, four hundred twenty-four".