12640275017 has 4 divisors (see below), whose sum is σ = 13048025856. Its totient is φ = 12232524180.

The previous prime is 12640275001. The next prime is 12640275023. The reversal of 12640275017 is 71057204621.

12640275017 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 12640275017 - 2⁴ = 12640275001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12640275077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203875373 + ... + 203875434.

It is an arithmetic number, because the mean of its divisors is an integer number (3262006464).

Almost surely, 2^12640275017 is an apocalyptic number.

It is an amenable number.

12640275017 is a deficient number, since it is larger than the sum of its proper divisors (407750839).

12640275017 is an equidigital number, since it uses as much as digits as its factorization.

12640275017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407750838.

The product of its (nonzero) digits is 23520, while the sum is 35.

Adding to 12640275017 its reverse (71057204621), we get a palindrome (83697479638).

The spelling of 12640275017 in words is "twelve billion, six hundred forty million, two hundred seventy-five thousand, seventeen".