1081185563 has 2 divisors, whose sum is σ = 1081185564. Its totient is φ = 1081185562.

The previous prime is 1081185517. The next prime is 1081185577. The reversal of 1081185563 is 3655811801.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1081185563 - 2¹⁰ = 1081184539 is a prime.

It is not a weakly prime, because it can be changed into another prime (1081185583) 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, 540592781 + 540592782.

It is an arithmetic number, because the mean of its divisors is an integer number (540592782).

Almost surely, 2^1081185563 is an apocalyptic number.

1081185563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081185563 is an equidigital number, since it uses as much as digits as its factorization.

1081185563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 38.

The square root of 1081185563 is about 32881.3862694382. The cubic root of 1081185563 is about 1026.3608537195.

The spelling of 1081185563 in words is "one billion, eighty-one million, one hundred eighty-five thousand, five hundred sixty-three".