13240361465 has 4 divisors (see below), whose sum is σ = 15888433764. Its totient is φ = 10592289168.

The previous prime is 13240361443. The next prime is 13240361479. The reversal of 13240361465 is 56416304231.

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 1957885504 + 11282475961 = 44248^2 + 106219^2 .

It is a cyclic number.

It is not a de Polignac number, because 13240361465 - 2²⁶ = 13173252601 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1324036142 + ... + 1324036151.

It is an arithmetic number, because the mean of its divisors is an integer number (3972108441).

Almost surely, 2^13240361465 is an apocalyptic number.

It is an amenable number.

13240361465 is a deficient number, since it is larger than the sum of its proper divisors (2648072299).

13240361465 is an equidigital number, since it uses as much as digits as its factorization.

13240361465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2648072298.

The product of its (nonzero) digits is 51840, while the sum is 35.

Adding to 13240361465 its reverse (56416304231), we get a palindrome (69656665696).

The spelling of 13240361465 in words is "thirteen billion, two hundred forty million, three hundred sixty-one thousand, four hundred sixty-five".