11565065051 has 4 divisors (see below), whose sum is σ = 11631915312. Its totient is φ = 11498214792.

The previous prime is 11565065023. The next prime is 11565065059. The reversal of 11565065051 is 15056056511.

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

It is a cyclic number.

It is not a de Polignac number, because 11565065051 - 2¹⁴ = 11565048667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11565065059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33424871 + ... + 33425216.

It is an arithmetic number, because the mean of its divisors is an integer number (2907978828).

Almost surely, 2^11565065051 is an apocalyptic number.

11565065051 is a deficient number, since it is larger than the sum of its proper divisors (66850261).

11565065051 is an equidigital number, since it uses as much as digits as its factorization.

11565065051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66850260.

The product of its (nonzero) digits is 22500, while the sum is 35.

The spelling of 11565065051 in words is "eleven billion, five hundred sixty-five million, sixty-five thousand, fifty-one".