12452116645 has 4 divisors (see below), whose sum is σ = 14942539980. Its totient is φ = 9961693312.

The previous prime is 12452116643. The next prime is 12452116679. The reversal of 12452116645 is 54661125421.

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 9214848036 + 3237268609 = 95994^2 + 56897^2 .

It is a cyclic number.

It is not a de Polignac number, because 12452116645 - 2¹ = 12452116643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12452116643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1245211660 + ... + 1245211669.

It is an arithmetic number, because the mean of its divisors is an integer number (3735634995).

Almost surely, 2^12452116645 is an apocalyptic number.

It is an amenable number.

12452116645 is a deficient number, since it is larger than the sum of its proper divisors (2490423335).

12452116645 is an equidigital number, since it uses as much as digits as its factorization.

12452116645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2490423334.

The product of its digits is 57600, while the sum is 37.

The spelling of 12452116645 in words is "twelve billion, four hundred fifty-two million, one hundred sixteen thousand, six hundred forty-five".