12143655565 has 8 divisors (see below), whose sum is σ = 14578599168. Its totient is φ = 9710782800.

The previous prime is 12143655553. The next prime is 12143655583. The reversal of 12143655565 is 56555634121.

It is a happy number.

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

It is not a de Polignac number, because 12143655565 - 2²¹ = 12141558413 is a prime.

It is a Duffinian number.

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, 504777 + ... + 528286.

It is an arithmetic number, because the mean of its divisors is an integer number (1822324896).

Almost surely, 2^12143655565 is an apocalyptic number.

It is an amenable number.

12143655565 is a deficient number, since it is larger than the sum of its proper divisors (2434943603).

12143655565 is a wasteful number, since it uses less digits than its factorization.

12143655565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035419.

The product of its digits is 540000, while the sum is 43.

The spelling of 12143655565 in words is "twelve billion, one hundred forty-three million, six hundred fifty-five thousand, five hundred sixty-five".