11320420565 has 32 divisors (see below), whose sum is σ = 14083027200. Its totient is φ = 8730846720.

The previous prime is 11320420549. The next prime is 11320420583. The reversal of 11320420565 is 56502402311.

It is not a de Polignac number, because 11320420565 - 2⁴ = 11320420549 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7899089 + ... + 7900521.

It is an arithmetic number, because the mean of its divisors is an integer number (440094600).

Almost surely, 2^11320420565 is an apocalyptic number.

It is an amenable number.

11320420565 is a deficient number, since it is larger than the sum of its proper divisors (2762606635).

11320420565 is a wasteful number, since it uses less digits than its factorization.

11320420565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1997.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 11320420565 its reverse (56502402311), we get a palindrome (67822822876).

The spelling of 11320420565 in words is "eleven billion, three hundred twenty million, four hundred twenty thousand, five hundred sixty-five".