12750644969 has 4 divisors (see below), whose sum is σ = 12751529796. Its totient is φ = 12749760144.

The previous prime is 12750644927. The next prime is 12750644983. The reversal of 12750644969 is 96944605721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96944605721 = 991 ⋅97825031.

It can be written as a sum of positive squares in 2 ways, for example, as 10229299600 + 2521345369 = 101140^2 + 50213^2 .

It is a cyclic number.

It is not a de Polignac number, because 12750644969 - 2⁸ = 12750644713 is a prime.

It is a super-2 number, since 2×12750644969² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12750644969.

It is not an unprimeable number, because it can be changed into a prime (12750644989) 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, 420434 + ... + 449739.

It is an arithmetic number, because the mean of its divisors is an integer number (3187882449).

Almost surely, 2^12750644969 is an apocalyptic number.

It is an amenable number.

12750644969 is a deficient number, since it is larger than the sum of its proper divisors (884827).

12750644969 is an equidigital number, since it uses as much as digits as its factorization.

12750644969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884826.

The product of its (nonzero) digits is 3265920, while the sum is 53.

The spelling of 12750644969 in words is "twelve billion, seven hundred fifty million, six hundred forty-four thousand, nine hundred sixty-nine".