12456878516 has 24 divisors (see below), whose sum is σ = 22138523400. Its totient is φ = 6132252672.

The previous prime is 12456878437. The next prime is 12456878527. The reversal of 12456878516 is 61587865421.

It can be written as a sum of positive squares in 4 ways, for example, as 323856016 + 12133022500 = 17996^2 + 110150^2 .

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8291 + ... + 158058.

It is an arithmetic number, because the mean of its divisors is an integer number (922438475).

Almost surely, 2^12456878516 is an apocalyptic number.

It is an amenable number.

12456878516 is a deficient number, since it is larger than the sum of its proper divisors (9681644884).

12456878516 is a wasteful number, since it uses less digits than its factorization.

12456878516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166643 (or 166641 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 53.

The spelling of 12456878516 in words is "twelve billion, four hundred fifty-six million, eight hundred seventy-eight thousand, five hundred sixteen".