1116041561 has 2 divisors, whose sum is σ = 1116041562. Its totient is φ = 1116041560.

The previous prime is 1116041467. The next prime is 1116041567. The reversal of 1116041561 is 1651406111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1067655625 + 48385936 = 32675^2 + 6956^2 .

It is a cyclic number.

It is not a de Polignac number, because 1116041561 - 2¹⁰ = 1116040537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1116041561.

It is not a weakly prime, because it can be changed into another prime (1116041567) by changing a digit.

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 as a sum of consecutive naturals, namely, 558020780 + 558020781.

It is an arithmetic number, because the mean of its divisors is an integer number (558020781).

Almost surely, 2^1116041561 is an apocalyptic number.

It is an amenable number.

1116041561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1116041561 is an equidigital number, since it uses as much as digits as its factorization.

1116041561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 1116041561 is about 33407.2082191853. The cubic root of 1116041561 is about 1037.2739135947.

Adding to 1116041561 its reverse (1651406111), we get a palindrome (2767447672).

The spelling of 1116041561 in words is "one billion, one hundred sixteen million, forty-one thousand, five hundred sixty-one".