12143123654 has 16 divisors (see below), whose sum is σ = 19247224320. Its totient is φ = 5734065480.

The previous prime is 12143123609. The next prime is 12143123683. The reversal of 12143123654 is 45632134121.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12143123654.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1667132 + ... + 1674399.

It is an arithmetic number, because the mean of its divisors is an integer number (1202951520).

Almost surely, 2^12143123654 is an apocalyptic number.

12143123654 is a deficient number, since it is larger than the sum of its proper divisors (7104100666).

12143123654 is a wasteful number, since it uses less digits than its factorization.

12143123654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3341635.

The product of its digits is 17280, while the sum is 32.

Adding to 12143123654 its reverse (45632134121), we get a palindrome (57775257775).

The spelling of 12143123654 in words is "twelve billion, one hundred forty-three million, one hundred twenty-three thousand, six hundred fifty-four".