1143612665 has 16 divisors (see below), whose sum is σ = 1479309888. Its totient is φ = 843708096.

The previous prime is 1143612629. The next prime is 1143612677. The reversal of 1143612665 is 5662163411.

It is a cyclic number.

It is not a de Polignac number, because 1143612665 - 2⁸ = 1143612409 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65162 + ... + 80828.

It is an arithmetic number, because the mean of its divisors is an integer number (92456868).

Almost surely, 2^1143612665 is an apocalyptic number.

It is an amenable number.

1143612665 is a deficient number, since it is larger than the sum of its proper divisors (335697223).

1143612665 is a wasteful number, since it uses less digits than its factorization.

1143612665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16808.

The product of its digits is 25920, while the sum is 35.

The square root of 1143612665 is about 33817.3426661528. The cubic root of 1143612665 is about 1045.7462569400.

The spelling of 1143612665 in words is "one billion, one hundred forty-three million, six hundred twelve thousand, six hundred sixty-five".