12440143502 has 16 divisors (see below), whose sum is σ = 18720735552. Its totient is φ = 6199925760.

The previous prime is 12440143433. The next prime is 12440143523. The reversal of 12440143502 is 20534104421.

It is a congruent number.

It is an unprimeable number.

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, 1022318 + ... + 1034414.

It is an arithmetic number, because the mean of its divisors is an integer number (1170045972).

Almost surely, 2^12440143502 is an apocalyptic number.

12440143502 is a deficient number, since it is larger than the sum of its proper divisors (6280592050).

12440143502 is a wasteful number, since it uses less digits than its factorization.

12440143502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13723.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 12440143502 its reverse (20534104421), we get a palindrome (32974247923).

The spelling of 12440143502 in words is "twelve billion, four hundred forty million, one hundred forty-three thousand, five hundred two".