11863916585 has 4 divisors (see below), whose sum is σ = 14236699908. Its totient is φ = 9491133264.

The previous prime is 11863916567. The next prime is 11863916609. The reversal of 11863916585 is 58561936811.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6731053849 + 5132862736 = 82043^2 + 71644^2 .

It is a cyclic number.

It is not a de Polignac number, because 11863916585 - 2⁸ = 11863916329 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1186391654 + ... + 1186391663.

It is an arithmetic number, because the mean of its divisors is an integer number (3559174977).

Almost surely, 2^11863916585 is an apocalyptic number.

It is an amenable number.

11863916585 is a deficient number, since it is larger than the sum of its proper divisors (2372783323).

11863916585 is an equidigital number, since it uses as much as digits as its factorization.

11863916585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2372783322.

The product of its digits is 1555200, while the sum is 53.

The spelling of 11863916585 in words is "eleven billion, eight hundred sixty-three million, nine hundred sixteen thousand, five hundred eighty-five".