11365661240465 has 16 divisors (see below), whose sum is σ = 15587252703360. Its totient is φ = 7793566206720.

The previous prime is 11365661240389. The next prime is 11365661240467. The reversal of 11365661240465 is 56404216656311.

It is a de Polignac number, because none of the positive numbers 2^k-11365661240465 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11365661240467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12372206 + ... + 13259064.

It is an arithmetic number, because the mean of its divisors is an integer number (974203293960).

Almost surely, 2^{11365661240465} is an apocalyptic number.

It is an amenable number.

11365661240465 is a deficient number, since it is larger than the sum of its proper divisors (4221591462895).

11365661240465 is an equidigital number, since it uses as much as digits as its factorization.

11365661240465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253032.

The product of its (nonzero) digits is 3110400, while the sum is 50.

Adding to 11365661240465 its reverse (56404216656311), we get a palindrome (67769877896776).

The spelling of 11365661240465 in words is "eleven trillion, three hundred sixty-five billion, six hundred sixty-one million, two hundred forty thousand, four hundred sixty-five".