1113544561 has 2 divisors, whose sum is σ = 1113544562. Its totient is φ = 1113544560.

The previous prime is 1113544529. The next prime is 1113544589. The reversal of 1113544561 is 1654453111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1105163536 + 8381025 = 33244^2 + 2895^2 .

It is a cyclic number.

It is not a de Polignac number, because 1113544561 - 2⁵ = 1113544529 is a prime.

It is not a weakly prime, because it can be changed into another prime (1113544511) 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 as a sum of consecutive naturals, namely, 556772280 + 556772281.

It is an arithmetic number, because the mean of its divisors is an integer number (556772281).

Almost surely, 2^1113544561 is an apocalyptic number.

It is an amenable number.

1113544561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1113544561 is an equidigital number, since it uses as much as digits as its factorization.

1113544561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 31.

The square root of 1113544561 is about 33369.8151178576. The cubic root of 1113544561 is about 1036.4997467806.

Adding to 1113544561 its reverse (1654453111), we get a palindrome (2767997672).

It can be divided in two parts, 11135 and 44561, that added together give a square (55696 = 236²).

The spelling of 1113544561 in words is "one billion, one hundred thirteen million, five hundred forty-four thousand, five hundred sixty-one".