11431444446 has 48 divisors (see below), whose sum is σ = 25457796000. Its totient is φ = 3704543424.

The previous prime is 11431444399. The next prime is 11431444511. The reversal of 11431444446 is 64444413411.

It is a self number, because there is not a number n which added to its sum of digits gives 11431444446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 925600 + ... + 937868.

It is an arithmetic number, because the mean of its divisors is an integer number (530370750).

Almost surely, 2^11431444446 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11431444446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12728898000).

11431444446 is an abundant number, since it is smaller than the sum of its proper divisors (14026351554).

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

11431444446 is a wasteful number, since it uses less digits than its factorization.

11431444446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13713 (or 13710 counting only the distinct ones).

The product of its digits is 73728, while the sum is 36.

Adding to 11431444446 its reverse (64444413411), we get a palindrome (75875857857).

The spelling of 11431444446 in words is "eleven billion, four hundred thirty-one million, four hundred forty-four thousand, four hundred forty-six".