1116143561 has 32 divisors (see below), whose sum is σ = 1314001920. Its totient is φ = 939859200.

The previous prime is 1116143549. The next prime is 1116143569. The reversal of 1116143561 is 1653416111.

It is a cyclic number.

It is not a de Polignac number, because 1116143561 - 2²⁶ = 1049034697 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1116143569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 501431 + ... + 503651.

It is an arithmetic number, because the mean of its divisors is an integer number (41062560).

Almost surely, 2^1116143561 is an apocalyptic number.

It is an amenable number.

1116143561 is a deficient number, since it is larger than the sum of its proper divisors (197858359).

1116143561 is a wasteful number, since it uses less digits than its factorization.

1116143561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2337.

The product of its digits is 2160, while the sum is 29.

The square root of 1116143561 is about 33408.7348009469. The cubic root of 1116143561 is about 1037.3055129902.

Adding to 1116143561 its reverse (1653416111), we get a palindrome (2769559672).

The spelling of 1116143561 in words is "one billion, one hundred sixteen million, one hundred forty-three thousand, five hundred sixty-one".