12715268645 has 4 divisors (see below), whose sum is σ = 15258322380. Its totient is φ = 10172214912.

The previous prime is 12715268639. The next prime is 12715268651. The reversal of 12715268645 is 54686251721.

It is a Cunningham number, because it is equal to 112762²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54686251721 = 5309 ⋅10300669.

It is an interprime number because it is at equal distance from previous prime (12715268639) and next prime (12715268651).

It can be written as a sum of positive squares in 2 ways, for example, as 4577604964 + 8137663681 = 67658^2 + 90209^2 .

It is a cyclic number.

It is not a de Polignac number, because 12715268645 - 2¹⁴ = 12715252261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12715268645.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1271526860 + ... + 1271526869.

It is an arithmetic number, because the mean of its divisors is an integer number (3814580595).

Almost surely, 2^12715268645 is an apocalyptic number.

It is an amenable number.

12715268645 is a deficient number, since it is larger than the sum of its proper divisors (2543053735).

12715268645 is an equidigital number, since it uses as much as digits as its factorization.

12715268645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2543053734.

The product of its digits is 806400, while the sum is 47.

The spelling of 12715268645 in words is "twelve billion, seven hundred fifteen million, two hundred sixty-eight thousand, six hundred forty-five".