12440143501 has 8 divisors (see below), whose sum is σ = 12592974240. Its totient is φ = 12287383152.

The previous prime is 12440143433. The next prime is 12440143523. The reversal of 12440143501 is 10534104421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12440143501 - 2²¹ = 12438046349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12440143571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 397690 + ... + 427828.

It is an arithmetic number, because the mean of its divisors is an integer number (1574121780).

Almost surely, 2^12440143501 is an apocalyptic number.

It is an amenable number.

12440143501 is a deficient number, since it is larger than the sum of its proper divisors (152830739).

12440143501 is an equidigital number, since it uses as much as digits as its factorization.

12440143501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35195.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 12440143501 its reverse (10534104421), we get a palindrome (22974247922).

The spelling of 12440143501 in words is "twelve billion, four hundred forty million, one hundred forty-three thousand, five hundred one".