12648774989 has 4 divisors (see below), whose sum is σ = 12649622400. Its totient is φ = 12647927580.

The previous prime is 12648774973. The next prime is 12648775001. The reversal of 12648774989 is 98947784621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98947784621 = 7 ⋅14135397803.

It is a cyclic number.

It is not a de Polignac number, because 12648774989 - 2⁴ = 12648774973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12648774949) 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, 400907 + ... + 431304.

It is an arithmetic number, because the mean of its divisors is an integer number (3162405600).

Almost surely, 2^12648774989 is an apocalyptic number.

It is an amenable number.

12648774989 is a deficient number, since it is larger than the sum of its proper divisors (847411).

12648774989 is an equidigital number, since it uses as much as digits as its factorization.

12648774989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847410.

The product of its digits is 48771072, while the sum is 65.

The spelling of 12648774989 in words is "twelve billion, six hundred forty-eight million, seven hundred seventy-four thousand, nine hundred eighty-nine".