1361165563 has 2 divisors, whose sum is σ = 1361165564. Its totient is φ = 1361165562.

The previous prime is 1361165539. The next prime is 1361165573. The reversal of 1361165563 is 3655611631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1361165563 - 2⁹ = 1361165051 is a prime.

It is not a weakly prime, because it can be changed into another prime (1361165573) 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, 680582781 + 680582782.

It is an arithmetic number, because the mean of its divisors is an integer number (680582782).

Almost surely, 2^1361165563 is an apocalyptic number.

1361165563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1361165563 is an equidigital number, since it uses as much as digits as its factorization.

1361165563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48600, while the sum is 37.

The square root of 1361165563 is about 36893.9773269297. The cubic root of 1361165563 is about 1108.2480717925.

The spelling of 1361165563 in words is "one billion, three hundred sixty-one million, one hundred sixty-five thousand, five hundred sixty-three".