12323311440 has 80 divisors (see below), whose sum is σ = 41675207616. Its totient is φ = 2987468800.

The previous prime is 12323311433. The next prime is 12323311513. The reversal of 12323311440 is 4411332321.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 12323311440.

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, 2331321 + ... + 2336600.

Almost surely, 2^12323311440 is an apocalyptic number.

12323311440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12323311440 is an abundant number, since it is smaller than the sum of its proper divisors (29351896176).

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

12323311440 is a wasteful number, since it uses less digits than its factorization.

12323311440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4667948 (or 4667942 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 12323311440 its reverse (4411332321), we get a palindrome (16734643761).

The spelling of 12323311440 in words is "twelve billion, three hundred twenty-three million, three hundred eleven thousand, four hundred forty".