12143311440 has 80 divisors (see below), whose sum is σ = 40539988608. Its totient is φ = 2989122048.

The previous prime is 12143311421. The next prime is 12143311451. The reversal of 12143311440 is 4411334121.

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 12143311440.

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, 1942924 + ... + 1949163.

Almost surely, 2^12143311440 is an apocalyptic number.

12143311440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12143311440 is an abundant number, since it is smaller than the sum of its proper divisors (28396677168).

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

12143311440 is a wasteful number, since it uses less digits than its factorization.

12143311440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3892116 (or 3892110 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 12143311440 its reverse (4411334121), we get a palindrome (16554645561).

The spelling of 12143311440 in words is "twelve billion, one hundred forty-three million, three hundred eleven thousand, four hundred forty".