12873291915969 has 9 divisors (see below), whose sum is σ = 18594770537473. Its totient is φ = 8582187434772.

The previous prime is 12873291915961. The next prime is 12873291916039. The reversal of 12873291915969 is 96951919237821.

The square root of 12873291915969 is 3587937.

It is a perfect power (a square), and thus also a powerful number.

12873291915969 is a `hidden beast` number, since 1 + 2 + 8 + 7 + 3 + 29 + 1 + 9 + 1 + 596 + 9 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 12873291915969 - 2³ = 12873291915961 is a prime.

It is a super-2 number, since 2×12873291915969² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12873291915897 and 12873291915906.

It is not an unprimeable number, because it can be changed into a prime (12873291915961) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 10165822 + ... + 11361800.

Almost surely, 2^{12873291915969} is an apocalyptic number.

12873291915969 is the 3587937-th square number.

12873291915969 is the 1793969-th centered octagonal number.

It is an amenable number.

12873291915969 is a deficient number, since it is larger than the sum of its proper divisors (5721478621504).

12873291915969 is an frugal number, since it uses more digits than its factorization.

12873291915969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2391964 (or 1195982 counting only the distinct ones).

The product of its digits is 132269760, while the sum is 72.

The spelling of 12873291915969 in words is "twelve trillion, eight hundred seventy-three billion, two hundred ninety-one million, nine hundred fifteen thousand, nine hundred sixty-nine".