12451513632665 has 4 divisors (see below), whose sum is σ = 14941816359204. Its totient is φ = 9961210906128.

The previous prime is 12451513632659. The next prime is 12451513632707. The reversal of 12451513632665 is 56623631515421.

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 1633255884121 + 10818257748544 = 1277989^2 + 3289112^2 .

It is a cyclic number.

It is not a de Polignac number, because 12451513632665 - 2³⁶ = 12382794155929 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, 1245151363262 + ... + 1245151363271.

It is an arithmetic number, because the mean of its divisors is an integer number (3735454089801).

Almost surely, 2^{12451513632665} is an apocalyptic number.

It is an amenable number.

12451513632665 is a deficient number, since it is larger than the sum of its proper divisors (2490302726539).

12451513632665 is an equidigital number, since it uses as much as digits as its factorization.

12451513632665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2490302726538.

The product of its digits is 3888000, while the sum is 50.

The spelling of 12451513632665 in words is "twelve trillion, four hundred fifty-one billion, five hundred thirteen million, six hundred thirty-two thousand, six hundred sixty-five".