12812463617 has 4 divisors (see below), whose sum is σ = 12868906416. Its totient is φ = 12756020820.

The previous prime is 12812463571. The next prime is 12812463619. The reversal of 12812463617 is 71636421821.

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: 71636421821 = 251 ⋅285404071.

It is a cyclic number.

It is not a de Polignac number, because 12812463617 - 2²⁰ = 12811415041 is a prime.

It is a super-3 number, since 3×12812463617³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12812463619) by changing a digit.

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, 28221059 + ... + 28221512.

It is an arithmetic number, because the mean of its divisors is an integer number (3217226604).

Almost surely, 2^12812463617 is an apocalyptic number.

It is an amenable number.

12812463617 is a deficient number, since it is larger than the sum of its proper divisors (56442799).

12812463617 is an equidigital number, since it uses as much as digits as its factorization.

12812463617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56442798.

The product of its digits is 96768, while the sum is 41.

The spelling of 12812463617 in words is "twelve billion, eight hundred twelve million, four hundred sixty-three thousand, six hundred seventeen".