11561302005 has 64 divisors (see below), whose sum is σ = 20542464000. Its totient is φ = 5505477120.

The previous prime is 11561301959. The next prime is 11561302021. The reversal of 11561302005 is 50020316511.

It is not a de Polignac number, because 11561302005 - 2¹⁰ = 11561300981 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2591737 + ... + 2596193.

It is an arithmetic number, because the mean of its divisors is an integer number (320976000).

Almost surely, 2^11561302005 is an apocalyptic number.

11561302005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11561302005 is a deficient number, since it is larger than the sum of its proper divisors (8981161995).

11561302005 is a wasteful number, since it uses less digits than its factorization.

11561302005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4754.

The product of its (nonzero) digits is 900, while the sum is 24.

Adding to 11561302005 its reverse (50020316511), we get a palindrome (61581618516).

The spelling of 11561302005 in words is "eleven billion, five hundred sixty-one million, three hundred two thousand, five".