11563913915 has 8 divisors (see below), whose sum is σ = 14138521488. Its totient is φ = 9076581280.

The previous prime is 11563913863. The next prime is 11563913923. The reversal of 11563913915 is 51931936511.

11563913915 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11563913915 - 2¹⁶ = 11563848379 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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21818441 + ... + 21818970.

It is an arithmetic number, because the mean of its divisors is an integer number (1767315186).

Almost surely, 2^11563913915 is an apocalyptic number.

11563913915 is a deficient number, since it is larger than the sum of its proper divisors (2574607573).

11563913915 is an equidigital number, since it uses as much as digits as its factorization.

11563913915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43637469.

The product of its digits is 109350, while the sum is 44.

The spelling of 11563913915 in words is "eleven billion, five hundred sixty-three million, nine hundred thirteen thousand, nine hundred fifteen".