12519966817 has 16 divisors (see below), whose sum is σ = 13089288960. Its totient is φ = 11964580992.

The previous prime is 12519966769. The next prime is 12519966821. The reversal of 12519966817 is 71866991521.

It is a happy number.

12519966817 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12519966817 is a prime.

It is a super-2 number, since 2×12519966817² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12519964817) 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 15 ways as a sum of consecutive naturals, for example, 828909 + ... + 843877.

It is an arithmetic number, because the mean of its divisors is an integer number (818080560).

Almost surely, 2^12519966817 is an apocalyptic number.

It is an amenable number.

12519966817 is a deficient number, since it is larger than the sum of its proper divisors (569322143).

12519966817 is a wasteful number, since it uses less digits than its factorization.

12519966817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15432.

The product of its digits is 1632960, while the sum is 55.

The spelling of 12519966817 in words is "twelve billion, five hundred nineteen million, nine hundred sixty-six thousand, eight hundred seventeen".