12132143440 has 20 divisors (see below), whose sum is σ = 28207233684. Its totient is φ = 4852857344.

The previous prime is 12132143437. The next prime is 12132143459. The reversal of 12132143440 is 4434123121.

It can be written as a sum of positive squares in 2 ways, for example, as 3902750784 + 8229392656 = 62472^2 + 90716^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75825817 + ... + 75825976.

Almost surely, 2^12132143440 is an apocalyptic number.

12132143440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12132143440 is an abundant number, since it is smaller than the sum of its proper divisors (16075090244).

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

12132143440 is a wasteful number, since it uses less digits than its factorization.

12132143440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151651806 (or 151651800 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 12132143440 its reverse (4434123121), we get a palindrome (16566266561).

The spelling of 12132143440 in words is "twelve billion, one hundred thirty-two million, one hundred forty-three thousand, four hundred forty".