12315442465 has 4 divisors (see below), whose sum is σ = 14778530964. Its totient is φ = 9852353968.

The previous prime is 12315442457. The next prime is 12315442471. The reversal of 12315442465 is 56424451321.

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 9522637056 + 2792805409 = 97584^2 + 52847^2 .

It is a cyclic number.

It is not a de Polignac number, because 12315442465 - 2³ = 12315442457 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, 1231544242 + ... + 1231544251.

It is an arithmetic number, because the mean of its divisors is an integer number (3694632741).

Almost surely, 2^12315442465 is an apocalyptic number.

It is an amenable number.

12315442465 is a deficient number, since it is larger than the sum of its proper divisors (2463088499).

12315442465 is an equidigital number, since it uses as much as digits as its factorization.

12315442465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2463088498.

The product of its digits is 115200, while the sum is 37.

Adding to 12315442465 its reverse (56424451321), we get a palindrome (68739893786).

The spelling of 12315442465 in words is "twelve billion, three hundred fifteen million, four hundred forty-two thousand, four hundred sixty-five".