12878969515 has 4 divisors (see below), whose sum is σ = 15454763424. Its totient is φ = 10303175608.

The previous prime is 12878969503. The next prime is 12878969567. The reversal of 12878969515 is 51596987821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51596987821 = 223 ⋅231376627.

It is a cyclic number.

It is not a de Polignac number, because 12878969515 - 2⁵ = 12878969483 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1287896947 + ... + 1287896956.

It is an arithmetic number, because the mean of its divisors is an integer number (3863690856).

Almost surely, 2^12878969515 is an apocalyptic number.

12878969515 is a deficient number, since it is larger than the sum of its proper divisors (2575793909).

12878969515 is an equidigital number, since it uses as much as digits as its factorization.

12878969515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2575793908.

The product of its digits is 10886400, while the sum is 61.

The spelling of 12878969515 in words is "twelve billion, eight hundred seventy-eight million, nine hundred sixty-nine thousand, five hundred fifteen".