12456690878 has 16 divisors (see below), whose sum is σ = 19295293824. Its totient is φ = 6025082880.

The previous prime is 12456690839. The next prime is 12456690881. The reversal of 12456690878 is 87809665421.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126926 + ... + 202542.

It is an arithmetic number, because the mean of its divisors is an integer number (1205955864).

Almost surely, 2^12456690878 is an apocalyptic number.

12456690878 is a deficient number, since it is larger than the sum of its proper divisors (6838602946).

12456690878 is a wasteful number, since it uses less digits than its factorization.

12456690878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78307.

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 12456690878 in words is "twelve billion, four hundred fifty-six million, six hundred ninety thousand, eight hundred seventy-eight".