11506123430465 has 4 divisors (see below), whose sum is σ = 13807348116564. Its totient is φ = 9204898744368.

The previous prime is 11506123430413. The next prime is 11506123430497. The reversal of 11506123430465 is 56403432160511.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4212645415729 + 7293478014736 = 2052473^2 + 2700644^2 .

It is a cyclic number.

It is not a de Polignac number, because 11506123430465 - 2¹⁶ = 11506123364929 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 (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1150612343042 + ... + 1150612343051.

It is an arithmetic number, because the mean of its divisors is an integer number (3451837029141).

Almost surely, 2^{11506123430465} is an apocalyptic number.

It is an amenable number.

11506123430465 is a deficient number, since it is larger than the sum of its proper divisors (2301224686099).

11506123430465 is an equidigital number, since it uses as much as digits as its factorization.

11506123430465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2301224686098.

The product of its (nonzero) digits is 259200, while the sum is 41.

Adding to 11506123430465 its reverse (56403432160511), we get a palindrome (67909555590976).

The spelling of 11506123430465 in words is "eleven trillion, five hundred six billion, one hundred twenty-three million, four hundred thirty thousand, four hundred sixty-five".